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BOTC-TEG-6760
Example Transport Engineering Guide (TEG): Symmetricom TH5500 BITS distribution (Stratum 2 or 3 internal backup, external Stratum 1 source required).
Section Table of Contents Page
DS Data Sheet (weight, footprint, power, heat, timing, alarms/rm, DF blocks, CLEI) 2
1 Overview 3
2 Timing record book at BITS relay rack 3
3 Equipment requirements 4-5
4 Initial versus Remote TH5500 rack 1
5
5 Relay rack layouts 6
6 Management of timing output cables (panel material and installation routing)
7
7 Retrofit methods for old Symmetricom DCD-400/-523/ST2 and TSG-3800B systems
B) Tracer Lamp (TL) colors: TLs are used to identify near and far end cross
connect points in the DSX-3 environment. DSX-XA-BB-24R Cross Aisle and DSX4H
series DSX-3 panels (see section 4) have one TL LED for each position (24 per
panel). DSX4R series DSX-3 panels have two TL LEDs (front and back of panel) for
each position (32 per panel). The DSX-3 color standard is red for DS3 and yellow for
STS-1.
2
BOTC-TEG-2300
All ADC panels with TL capability are shipped with -48V red LEDs. If the panel
position usage is DS3 or unknown, the red LEDs should be left in place. If the panel
position usage is STS-1, the red LEDs should be replaced with yellow LEDs. These
ADC part numbers can be used to order -48V yellow LEDs (see section 11 for -24V
condition):
FLEDY: 1 yellow LED for DSX4H DSX-3 or DSX-XA-BB-24R Cross Aisle panel.
STS-KIT-Y: Kit of 24 yellow LEDs for DSX4H DSX-3 or DSX-XA-BB-24R Cross Aisle
panel.
FLED-A-YEL: 1 yellow LED for DSX4R DSX-3 panel.
FLED-A-KIT-YEL: Kit of 100 yellow LEDs for DSX4R DSX-3 panel.
In some cases, panels with yellow LEDs may need to be converted back to red (STS-1
termination changed to DS3). These ADC part numbers can be used to order -48V
red LEDs (see section 11 for -24V condition):
FLEDR: 1 red LED for DSX4H DSX-3 or DSX-XA-BB-24R Cross Aisle panel.
FLED-A-RED: 1 red LED for DSX4R DSX-3 panel.
8
8 System relationships (output modules, wire wrap panels, circuit count, P/S timing) 9
9 System connection details 10-13
Issue Revisions Date
1 Original release of Bill Oakes Symmetricom TH5500 Engineering Guide. February 7, 2003
18 Revise into Word format. October 1, 2007
Acronyms: American Wire Gauge (AWG), Battery Distribution Fuse Board (BDFB), Building Integrated Timing
Supply (BITS), Central Office (CO), Competitive Local Exchange Carrier (CLEC), Composite Clock 64Kb/s timing
(CC), Digital Signal 1.544Mb/s timing (DS1), Digital System Cross connect-manual (DSX), Distributing Frame (DF),
Enclosed Network Extension-RT/CEV/Hut/Prem (ENE), Global Positioning System (GPS), Network Element (NE),
Receive (RX), Support Engineering Guide (SEG), Transmit (TX).
Bill Oakes Telecom Consultants (BOTC)
[email protected], 831-476-0453
Copyright 2003. All rights reserved.
1
BOTC-TEG-6760
Data Sheet:
The preface section of all BOTC-TEGs is a data sheet that provides quick view information for weight, relay rack
footprint, peak (LIST 2)/nominal (LIST 1) power amperage, heat dissipation wattage, timing, alarms/remote
management, DF block and CLEI code requirements. The data shown is an ultimate condition (relay rack fully
loaded with equipment as designed in associated BOTC-TEG). Even though many relay rack deployments are
partially equipped, BOTC recommends basing initial space/engineering planning on ultimate data since existing
rack layouts typically grow to conclusion without follow-up involvement by planning personnel.
If an external source unit is mounted in TH5500 rack 1, see BOTC-TEG-6700 TP1100 GPS, BOTC-TEG-6720
TS3500 GPS or BOTC-TEG-6740 TC4500 Cesium Data Sheet for additional requirements.
Category Requirement
Weight See remarks
Timing (BITS) See remarks
Alarms
1 discrete for
TH5500 rack 1
only
Remote
management
1 Ethernet or
RS232 TL1
DF blocks N/A
PWFYAL1CAA
D0MTP004RA
D0MTN504RA
CLEI codes (see
BOTC-SEG-0600
section 4)
Peak/LIST 2
amperage at
42.6V
13.63 amps for
TH5500 rack 1
only
4.23 amps for master shelf. 2.35 amps for each of four expansion shelves.
LIST 2 applies to TH5500 rack 1 only (one master, two expansion shelves).
TH5500 rack 2 expansion shelves fused from rack 1 fuse panel.
Nominal/LIST 1
amperage at
52V
9.29 amps for
TH5500 rack 1
only
2.89 amps for master shelf. 1.6 amps for each of four expansion shelves.
LIST 1 applies to TH5500 rack 1 only (one master, two expansion shelves).
TH5500 rack 2 expansion shelves fused from rack 1 fuse panel.
Heat
dissipationSee remarks
Telect 0HPGMT05R fuse panel.
Symmetricom TH5500 master shelf
Symmetricom TH5500 expansion shelf
285 watts for TH5500 rack 1 (one master, two expansion shelves). 150
watts for TH5500 rack 2 (two expansion shelves).
TH5500 master shelf requires external timing from source unit in same
rack or distant CO (if Sonet ring distribution). See BOTC-TEG-6700 TP1100
GPS, BOTC-TEG-6720 TS3500 GPS or BOTC-TEG-6740 TC4500 Cesium.
1 status point required on CO alarm system for TH5500 rack 1 fuse panel
alarm. TH5500 system has 3 (CR, MJ, MN) discrete alarms but connection
is not required since integrated into TL1 remote management.
No DF connection for TH5500.
TH5500 Ethernet is the first choice method. RS232 is alternate second
choice. TH5500 rack 1 master shelf only.
Data sheet for Symmetricom TH5500 BITS distribution relay rack
Footprint
Remarks
300 pounds for TH5500 rack 1 (relay rack: 120, fuse panel: 10, three TH5500
shelves: 120, five wire wrap panels: 50). 240 pounds for TH5500 rack 2
(relay rack: 120, two TH5500 shelves: 80, four wire wrap panels: 40).
36" wide x 15"
deep
26" wide rack with 5" wide cable management panels on both sides. 5"
deep front and rear guard boxes. Applies to TH5500 rack 1 and 2. Rack 1
and 2 must be adjacent per section 9 part B and L.
2
BOTC-TEG-6760
1. Overview:
Symmetricom TH5500 equipment is designed to provide DS1 (1.544 Mb/s) or CC (64 Kb/s) timing distribution to
NEs. The system is fed from an external stratum 1 source mounted in the same rack or in a distant CO (if stratum 1
distribution is via Sonet ring). See BOTC-TEG-6700 TP1100 GPS, BOTC-TEG-6720 TS3500 GPS or BOTC-TEG-6740
TC4500 Cesium for additional details on stratum 1 equipment and timing distribution methods. Internal TH5500
stratum 2 or 3 modules are used as a backup source only when the external stratum 1 input signal has been lost.
The TH5500 system consists of a master shelf (140 outputs) and up to four expansion shelves (320 outputs each).
Master shelf timing outputs are divided into four sets (A to D). Up to seven (20 each A to C left and right, D right
only) DS1 or CC output modules (any combination) can be mounted on the master shelf rear side. Expansion shelf
timing outputs are divided into eight sets (A to H). Up to sixteen (20 each A to H upper and lower) DS1 or CC
output modules (any combination) can be mounted on the expansion shelf rear side. Each set (A to D on master, A
to H on expansion) requires two (work and protect) front side output cards and supports 40 timing outputs.
Master and expansion shelf output modules types can be mixed on any given alpha set (set can be 20 DS1/20 DS1,
20 CC/20 CC or 20 CC/20 DS1). A short 20 pair connectorized cable runs from each rear output module to a 160
circuit wire wrap panel (interface point for individual cables to NEs). One wire wrap panel is mounted above the
master shelf (circuit 1-140 active if shelf output cards/modules are equipped, 141-160 not used). Expansion
shelves have two wire wrap panels (one above, one below) with all circuits active if shelf output cards/modules
are equipped. See section 8 for the relationship of master/expansion shelf output modules, wire wrap panels,
numbering of output circuits and primary/secondary timing.
Service Provider/Telco NEs are timed directly from a TH5500 in the same CO building. If customer NEs (in CO or
outside of CO) are timed, a Bridging Office Repeater (BOR) shelf (ADC TBK-23R-28PNL for example) is added to
isolate customer timing problems from feeding back into the TH5500 equipment. One side of each BOR module
connects to a TH5500 output and the other side connects to a DSX-1 panel OUT jack so that signal quality can be
tested (via OUT jack monitor port). Customers within the CO building (CLEC) receive timing from the DSX-1 panel
jacks. If customers are located outside the CO, the DSX-1 panel jacks cross connect to T1 Repeater equipment drop
side circuits for transport to them.
Many Service Providers/Telcos have embedded Symmetricom DCD-400, DCD-523, DCD-ST2 or TSG-3800B timing
distribution equipment that was deployed starting in the late 1980s. Since replacement parts (cards, modules, etc)
are becoming difficult to obtain for these older systems, a retrofit procedure is detailed in section 7. This basically
involves installation of new TH5500 shelves (without wire wrap panels or with partial use panels), removal of old
DCD/TSG shelves, retention of old DCD/TSG wire wrap panels (so existing NE timing cables assigned to them
remain intact) and running new 20 pair cables from TH5500 output modules to old DCD/TSG wire wrap panels.
2. Timing record book at BITS relay rack:
Some Service Providers/Telcos may require installation vendors to establish a timing output assignment record at
the BITS relay rack. This is normally intended to assist CO personnel in identifying the relationship of output ports
at the BITS equipment and far end NE primary/secondary cable terminations. Since BITS equipment outputs tend
to be high density, stenciling space may not be available (on shelves or rack uprights) to clearly show all of the far
end NE assignments. One solution is to provide a timing record book for the BITS rack.
Timing record book kits can be ordered from CJK Company (Doyle Conaway; [email protected]; 972-270-
1086; Garland, Texas) using part number CJK-2286A. The kit includes one red book binder (12” x 9”) and one 36”
long tether (one end screws into spare hole in rack upright). Record sheets can be inserted/bound into the book
by installation.
3
BOTC-TEG-6760
3. Equipment requirements (see section 6 for cable management material):
This section provides part number and mounting/usage details for equipment in TH5500 BITS relay racks. See
section 5 figure 5A and 5B for assembly details. Plug-ins are listed here but they may be ordered separately via
Service Provider/Telco Plug-in Inventory Control System (PICS) routines.
A) Relay rack: One 7’ Network rack with 1.75 x 23 drilling and 5” front welded guard box. See BOTC-SEG-0600.
B) Rear guard box: One 5” rear field mount guard box must be ordered as a separate item so that the footprint
depth is 15” (5” front, 5” rear). See BOTC-SEG-0600.
C) Fuse panel: One Telect 0HPGMT05R. 1.75” high. See BOTC-SEG-0500.
D) Master shelf kit with wire wrap panel: Symmetricom 990-55500-01 kit. For regular or dual applications
per section 7 (interface point for all or most NE cables is new TH5500 wire wrap panel). Kit consists of one 090-
55501-03 master shelf, one 190-55595-01 wire wrap panel, one 090-55561-01 input alarm module, one set of 19”
to 23” rack adapter hardware, one system manual and eight 060-55591-02 cables (one spare, see section 9 part J).
E) Master shelf kit without wire wrap panel: Symmetricom 990-55500-10 kit. For retrofit applications only
per section 7 (interface point for all NE cables is existing DCD/TSG wire wrap panel). Kit consists of one 090-
55501-03 master shelf, one 090-55561-01 input alarm module, one set of 19” to 23” rack adapter hardware and
one system manual.
F) Management card kit for master shelf (PICS item?): One Symmetricom 990-55542-01 kit per master shelf.
Kit consists of one 090-55542-01 management card, one DB9 connection cable and one documentation CD.
G) Input module for master shelf (PICS item?): Two Symmetricom input modules per master shelf. Any one of
these four choices if initial TH5500 master. Stratum 3 choices only if remote TH5500 master per section 4.
090-55513-01: Stratum 2 module with 5 inputs for stand alone master shelf only (no expansion shelves).
090-55514-02: Stratum 2 module with 9 inputs for stand alone master shelf or system with expansion shelves.
090-55511-01: Stratum 3 module with 5 inputs for stand alone master shelf only (no expansion shelves).
090-55512-02: Stratum 3 module with 9 inputs for stand alone master shelf or system with expansion shelves.
H) Output module for rear side of master shelf (PICS item?): Any combination of these two Symmetricom
output module choices up to a total of seven per master shelf (timing set A to C left and right, D right only).
090-55591-01: DS1 module (20 outputs).
090-55593-01: CC module (20 outputs).
J) Blank panel for unequipped output module position on rear of master shelf (PICS item?): One
Symmetricom 090-55599-11 blank panel for each rear side position not equipped with part H output module.
K) Output card for front side of master or expansion shelf (PICS item?): Two Symmetricom 090-55581-01
output cards (work and protect) for each timing set (A to D on master shelf or A to H on expansion shelf). Quantity
is 2, 4, 6 or 8 per master shelf and 2, 4, 6, 8, 10, 12, 14 or 16 per expansion shelf.
L) Blank panel for unequipped output card position on front of master or expansion shelf (PICS item?):
One Symmetricom 093-55598-02 blank panel for each front side position not equipped with part K output card.
M) Expansion shelf kit with two wire wrap panels: Symmetricom 990-55505-02 kit. Used for regular or dual
applications per section 7 (interface point for all or most NE cables is new TH5500 wire wrap panels). Kit
consists of one 090-55505-03 expansion shelf, one 190-55595-01 wire wrap panel (A-D stencil), one 190-55595-
02 (E-H stencil), two 190-55505-01 line terminators (see section 9 part L), one 128-55505-01 gender changer, one
set of 19” to 23” rack adapter hardware, one system manual, two 060-55505-01 cables (see section 9 part L) and
sixteen 060-55591-02 cables (see section 9 part J).
N) Expansion shelf kit without wire wrap panels: Symmetricom 990-55505-10 kit. Used for retrofit
applications only per section 7 (interface point for all NE cables is existing DCD/TSG wire wrap panel). Kit
consists of one 090-55505-03 expansion shelf, two 190-55505-01 line terminators (see section 9 part L), one 128-
55505-01 gender changer, one set of 19” to 23” rack adapter hardware, one system manual and two 060-55505-01
cables (see section 9 part L).
4
BOTC-TEG-6760
P) Expansion shelf kit with one wire wrap panel: Symmetricom 990-55505-01 kit. Used for a mixture of
regular and retrofit applications per section 7 (interface point for NE cables is a combination of new TH5500
wire wrap panel and existing DCD/TSG wire wrap panel). Kit consists of one 090-55505-03 expansion shelf, one
190-55595-01 wire wrap panel (A-D stencil), two 190-55505-01 line terminators (see section 9 part L), one 128-
55505-01 gender changer, one set of 19” to 23” rack adapter hardware, one system manual, two 060-55505-01
cables (see section 9 part L) and eight 060-55591-02 cables (see section 9 part J).
Q) Controller card for expansion shelf (PICS item?): Two Symmetricom 090-55545-01 controller cards per
expansion shelf.
R) Output module for rear side of expansion shelf (PICS item?): Any combination of these two Symmetricom
output module choices up to a total of sixteen per expansion shelf (timing set A to H upper and lower).
090-55591-02: DS1 module (20 outputs).
090-55593-02: CC module (20 outputs).
S) Blank panel for unequipped output module position on rear of expansion shelf (PICS item?): One
Symmetricom 090-55599-12 blank panel for each rear side position not equipped with part R output module.
T) Special link cable for expansion shelf 3 only: Two Symmetricom 060-55505-02 link cables (10’ long) for
system mult connection between expansion shelf 3 (TH5500 rack 2) and shelf 2 (TH5500 rack 1). Replaces 060-
55505-01 cables (5’ long) provided with expansion shelf kit (part M, N or P). See section 9 part L.
U) Output module cable: When TH5500 master or expansion shelves are ordered without wire wrap panel (part
E, N or P), one Symmetricom 060-55591-02 cable (4’ long) must be provided for each output module that will be
used for a retrofit application per section 7. This cable allows an overhead retrofit cable (see section 9 part M and
N) to interface with the shelf output module.
V) MINI-DSX panel: MINI-DSX provided as part of external source equipment list if stratum 1 unit mounted in the
same rack as TH5500 BITS distribution system. MINI-DSX must be ordered as a separate item if source unit is in a
distant CO (stratum 1 distribution is via Sonet ring). See BOTC-TEG-6700 TP1100 GPS, BOTC-TEG-6720 TS3500
GPS or BOTC-TEG-6740 TC4500 Cesium for additional details on stratum 1 equipment and timing distribution
methods. ADC part number MINI-DSX-1/W-1.75X19 provides one MINI-DSX-1-1.75X19 three slot panel equipped
with one MINI-DSX-1/WM-1.75X19 eight position jack module. Two additional jack modules can be mounted on
the panel. 1.75” high, 19” wide, 9” deep. Panel mounting ears are reversible for 23” wide racks and designed for
flush set out only.
4. Initial versus Remote TH5500 rack 1:
Some COs may have multiple clusters of timed NEs in separate areas. In these cases, placing only one TH5500
system appearance in the CO can result abnormally long NE to BITS distribution cable runs (section 9 part K). To
maximize cable efficiency, an Initial TH5500 rack 1 (section 5 figure 5A layout includes plate 35-41 stratum 1
source and MINI-DSX equipment) is located in one NE area. Remote TH5500 rack 1 layouts (figure 5A does not
include stratum 1 and MINI-DSX) can then be established in the other NE areas. Remote rack 1 master shelves
receive their timing input from the Initial rack 1 master shelf per section 9 part H. Each rack 1 (Initial or Remote)
can have it’s own associated rack 2 (figure 5B layout).
All Remote rack 1 master shelves require two (primary and secondary) CC timing cables from the Initial rack 1
master shelf. These CC cables provide the basic timing reference and have a length limit of 1500’. Some jobs may
also require (engineering vendors should consult with Service Provider/Telco personnel) two DS1 timing cables
between the Remote and Initial master shelves. These DS1 cables are used for extraction of optional Synch Status
Message (SSM) signals and have a length limit of 655’. This may impact the CO placement location for Remote
TH5500 rack 1 equipment.
5
BOTC-TEG-6760
5. Relay rack layouts:
BV or 43 Fuse panel BV or 43 BU or 42 BU or 42 BT or 41 BT or 41
BS or 40 INSTALLATION: BS or 40
BR or 39 BR or 39 SNABQ or 38 BQ or 38
BP or 37 BP or 37
BN or 36 BN or 36
BM or 35 MINI-DSX BM or 35
BL or 34 BL or 34
BK or 33 BK or 33
BJ or 32 BJ or 32
BH or 31 SNA BH or 31
BG or 30 BG or 30 SNABF or 29 BF or 29
BE or 28 BE or 28
BD or 27 BD or 27 SNABC or 26 BC or 26
BB or 25 BB or 25
BA or 24 BA or 24
V or 23 V or 23
U or 22 SNA U or 22
T or 21 T or 21
S or 20 S or 20
R or 19 R or 19
Q or 18 Q or 18 SNA P or 17 P or 17 N or 16 N or 16 M or 15 M or 15
L or 14 L or 14
K or 13 SNA K or 13
J or 12 J or 12 H or 11 H or 11 G or 10 SNA G or 10
F or 9 F or 9
E or 8 E or 8
D or 7 D or 7 C or 6 C or 6 B or 5 B or 5
A or 4 A or 4
AA or 3 AA or 3
AB or 2 AB or 2
AC or 1 SNA AC or 1
AD or 0 AD or 0
1.75 x 23 1.75 x 23
FIGURE 5A FIGURE 5B
Space reserved for
optional TP1100, TS3500
or TC4500 stratum 1
source equipment.
TH5500 wire wrap panel
(1-140)
TH5500 master shelf
(1-140)
TH5500 wire wrap panel
(141-300)
TH5500 expansion
shelf 1
(141-460)
TH5500 wire wrap panel
(301-460)
TH5500 wire wrap panel
(461-620)
TH5500 expansion
shelf 2
(461-780)
TH5500 wire wrap panel
(621-780)
Layout for Initial TH5500 rack 1.
Remote TH5500 rack 1 (per section 4)
is same layout except no stratum 1
source or MINI-DSX equipment (plate
35-41). Rack footprint is 36" wide and
15" deep due to section 6 cable
management. Rack 1 and 2 must be
adjacent per section 9 part B and L.
TH5500 master and expansion
shelves are 10.5" high, 11.6"
deep and 19" wide. Ears for
23" wide mounting included
with shelf if ordered as part of
section 3 shelf kit. Ears
adjustable for flush, 2" or 5"
front set out (use 5" option).
Layout for TH5500 rack 2 associated
with Initial or Remote TH5500 rack 1.
Rack footprint is 36" wide and 15"
deep due to section 6 cable
management. Rack 1 and 2 must be
adjacent per section 9 part B and L.
TH5500 wire wrap panel
(781-940)
TH5500 expansion
shelf 3
(781-1100)
TH5500 wire wrap panel
(941-1100)
TH5500 wire wrap panel
(1101-1260)
TH5500 expansion
shelf 4
(1101-1420)
TH5500 wire wrap panel
(1261-1420)
TH5500 wire wrap panels are
3.5" high, 4.6" deep and 19"
wide. Ears for 23" wide
mounting included with panel
if ordered as part of section 3
shelf kit. Front set out is 4.6".
Mount panel on rear side of
rack uprights with wire wrap
pins facing rear aisle. See
section 6 for rear cable
management trough.
Space Not Available (SNA)
openings in rack layout are for
routing of section 9 part J
cables (rear of TH5500 shelf to
front of wire wrap panel).
6
BOTC-TEG-6760
6. Management of timing output cables (panel material and installation routing):
Due to the large number of NE single pair timing cables at the TH5500 system location (up to 780 for rack 1, up to
640 for rack 2), special horizontal and vertical cable management routines must be used. These requirements do
not apply when TH5500 shelves are added (without their own wire wrap panel) for a section 7 retrofit job.
To provide horizontal cable management:
A) Order one ADC AUX-0X0388 trough for each TH5500 wire wrap panel. Mount trough first (then wire wrap
panel) on rear side of rack uprights with floor of trough about .75” below bottom of wire wrap panel shown in
section 5 figure 5A or 5B layout. Do not use backplate provided with trough. Trough projects 5” out from rear of
rack uprights.
B) Order two Telect 02107-01 cable tie brackets for each TH5500 wire wrap panel. Mount brackets on rear side
of left and right rack uprights at same level as top of wire wrap panel shown in figure 5A or 5B.
C) Route cables from wire wrap panel timing set A, B or E, F pins through upper panel clips and then onto tie
bracket.
D) Route cables from wire wrap panel timing set C, D or G, H pins through lower panel clips and then into trough.
E) Cables from wire wrap panel timing set A, C or E, G pins exit to left side (as viewed from rear of rack). Cables
from timing set B, D or F, H exit to right side.
F) Do not store cable slack in rear trough area. Access to wire wrap panel timing output pins must be kept open
for CO personnel test/troubleshoot routines.
To provide vertical cable management:
N) If the CO overhead area is 7’, order two Nor-Cal Metals (510-836-1451, www.nc-mf.com) G314350130 cable
storage panels and six D350860030 junction plates for each TH5500 rack. The storage panel is 77.92” tall, 5” wide
and 5.625” deep. If the CO overhead area is 9’, order two G3143500230 panels (101.92” tall) and eight junction
plates. If the CO overhead area is 11’ 6”, order two G3143500330 panels (131.92” tall) and ten junction plates.
Mount junction plates in normal predrilled hole positions on front side of rack uprights. Place storage panels in
required positions (adjacent to uprights and projecting 5” to front). Use L portion of junction plates to mark hole
centers on storage panels. Drill and tap 12-24 holes (for No. 12 screw with 24 threads per inch) in storage panels.
Secure storage panels to L portion of junction plates with 12-24 screws. Screws must have .375” long threaded
area to provide full insertion and prevent excessive extension into cable area of storage panel.
P) Part N storage panels have a full height unistrut channel on the interior front side. Nor-Cal ring assemblies
attach to the unistrut channel at TH5500 wire wrap panel levels to provide a vertical to horizontal cable transition.
Four ring assemblies should be ordered for each storage panel (eight per TH5500 rack). Each ring assembly
consists of one NC-D1255-08 ring (4” x 5”) and one NC-G1240-1S-4.5 tie bar kit. The tie bar kit includes one NC-
D1240-1S-4.5 tie bar, one A4008 unistrut nut, one RHMS .375” x .75” screw and two 12-24 screws. The rings need
to have a .75” hole drilled by installation (provides clearance for RHMS screw head). Mount ring to tie bar using
the two 12-24 screws and drill a small hole in ring centered in the existing .44” tie bar hole. Remove ring from tie
bar and drill a .75” hole in ring using the new small hole as a center point. Mount A4008 unistrut nut at proper
level in panel unistrut channel. Attach tie bar to unistrut nut using RHMS screw. Attach ring to tie bar using 12-24
screws.
Q) When a part N storage panel is located at the end of a lineup, special Nor-Cal end guard parts are required. If
the CO overhead area is 7’, order one G312610130 end guard kit and three NC-D1250 support brackets. If 9’ area,
order one G312610230 end guard kit and four support brackets. If 11’ 6” area, order one G312610330 end guard
kit and five support brackets.
7
BOTC-TEG-6760
7. Retrofit methods for old Symmetricom DCD-400/-523/ST2 and TSG-3800B systems:
Many Service Providers/Telcos have embedded Symmetricom DCD-400, DCD-523, DCD-ST2 or TSG-3800B timing
distribution equipment that was deployed starting in the late 1980s. Since replacement parts (cards, modules, etc)
are becoming difficult to obtain for these older systems, a retrofit procedure is required. This basically involves
installation of new TH5500 shelves (without wire wrap panels or with dual use panels), removal of old DCD/TSG
shelves, retention of old DCD/TSG wire wrap panels (so existing NE timing cables assigned to them remain intact)
and running new 20 pair cables from TH5500 output modules to old DCD/TSG wire wrap panels. TH5500 shelves
can be fully used for regular applications (all output modules cabled to TH5500 wire wrap panel in same rack),
fully used for retrofit applications (all output modules cabled to existing DCD/TSG wire wrap panels) or a dual
application mixture of regular and retrofit (shelf output module cabling split between TH5500 and DCD/TSG wire
wrap panels on a per job custom basis).
The intent of this section is to provide an overview of the issues associated retrofit jobs.
A) Preliminary walkthough: Due to the unique conditions in each CO, a preliminary walkthrough is required to
review the existing BITS equipment design and develop a detailed retrofit plan. At a minimum, the walkthrough
team should consist of Service Provider/Telco representatives (job coordinator, BITS maintenance engineer, etc)
and the engineering vendor.
B) Continued use of existing DCD/TSG wire wrap panels: Each embedded DCD/TSG shelf has an associated
wire wrap panel (located near the shelf) for termination of single pair NE timing cables. In most cases, retrofit jobs
will remove the DCD/TSG shelf but leave the wire wrap panel in place. This eliminates the need to recable all NEs
to a new wire wrap panel associated with the new TH5500 shelf. TH5500 shelf output modules will connect to the
DCD/TSG wire wrap panel per section 9 part M or N. If existing DCD/TSG shelves have a very small number of NE
timing assignments, it may be more cost effective to recable the NE circuits to a new TH5500 wire wrap panel and
remove the existing DCD/TSG wire wrap panel.
C) Designation of DCD/TSG wire wrap panels: Each remaining DCD/TSG wire wrap panel must be designated
with a unique number on a per rack basis to support field identification and office record entries.
D) Length limit for timing circuits: Timing circuits have a length limit of 655’ for DS1 and 1500’ for CC. When
DCD/TSG systems were originally deployed, the impact of extending these circuits (section 9 part M or N cabling)
was not anticipated. Retrofit jobs should evaluate all existing NE to DCD/TSG wire wrap panel cable lengths and
then add the section 9 part M or N footage. If the sum exceeds length limit standards, the NEs must be recabled to a
new wire wrap panel.
E) TH5500 vertical cable management panels: Vertical cable management panels shown in section 6 part N-Q
are intended for TH5500 racks with a full set of NE timing circuits cabled to wire wrap panels in that rack. This
involves floor space planning for 5” of extra width on each side of the TH5500 rack. Retrofit jobs will probably run
most of the TH5500 timing outputs to existing DCD/TSG wire wrap panels and initially minimize or eliminate the
need for these 5” panels. As future NEs are deployed in the TH5500 rack area (with timing cables run directly to
TH5500 wire wrap panels), the need for cable management in that rack will gradually increase but the left/right 5”
side space may no longer be available. Placement of the 5” left/right panels on initial retrofit jobs is a preliminary
walkthrough judgment decision.
F) TH5500 Primary and Secondary timing groups: The section 8 figure 8 “Primary or Secondary” column has
two choices for P and S timing groups (sets of 40 or sets of 20). Sets of 40 is the preferred method since it provides
a clean left/right split for wire wrap panel outputs to rack upright cabling (per section 6 part E) and keeps TH5500
40 circuit front side output cards all P or all S. Sets of 20 should only be used on retrofit jobs were existing NE P
and S cable terminations on DCD/TSG wire wrap panels drives the need for this method (to more fully utilize
section 9 part M or N TH5500 output module cable connections that are also in sets of 20 timing circuits).
8
BOTC-TEG-6760
8. System relationships:
Figure 8 shows the relationship of TH5500 master/expansion shelf output modules, wire wrap panels, output
circuits and primary/secondary timing.
TH5500 shelves can be fully used for regular applications (all output modules cabled to TH5500 wire wrap panel
in same rack, all figure 8 columns apply as shown), fully used for retrofit applications (all output modules cabled to
existing DCD/TSG wire wrap panels per section 7, the two figure 8 “wire wrap” columns do not apply) or a dual
application mixture of regular and retrofit (shelf output module cabling split between TH5500 and DCD/TSG wire
wrap panels on a custom basis, the two figure 8 “wire wrap” columns partially apply based on job conditions).
The figure 8 “Primary or Secondary” column has two choices for P and S timing groups (sets of 40 or sets of 20).
Sets of 40 (aligns with system alpha timing sets) is the preferred method since it provides a clean left/right split for
wire wrap panel outputs to rack upright cabling (per section 6 part E) and keeps the 40 circuit front side output
cards all P or all S. Sets of 20 should only be used on retrofit jobs were existing NE P and S cable terminations on
DCD/TSG wire wrap panels drives the need for this method.
Master Exp 1 Exp 2 Exp 3 Exp 4
A (right) A1-20 (upper) A1-20 1-20 P
A (left) A21-40 (upper) A21-40 21-40 S
B (right) B1-20 (upper) B1-20 41-60 P
B (left) B21-40 (upper) B21-40 61-80 S
C (right) C1-20 (upper) C1-20 81-100 P
C (left) C21-40 (upper) C21-40 101-120 S
D (right) D1-20 (upper) D1-20 121-140 S P
A (upper) A1-20 (upper) A1-20 141-160 461-480 781-800 1101-1120 P
A (lower) A21-40 (upper) A21-40 161-180 481-500 801-820 1121-1140 S
B (upper) B1-20 (upper) B1-20 181-200 501-520 821-840 1141-1160 P
B (lower) B21-40 (upper) B21-40 201-220 521-540 841-860 1161-1180 S
C (upper) C1-20 (upper) C1-20 221-240 541-560 861-880 1181-1200 P
C (lower) C21-40 (upper) C21-40 241-260 561-580 881-900 1201-1220 S
D (upper) D1-20 (upper) D1-20 261-280 581-600 901-920 1221-1240 P
D (lower) D21-40 (upper) D21-40 281-300 601-620 921-940 1241-1260 S
E (upper) E1-20 (lower) E1-20 301-320 621-640 941-960 1261-1280 P
E (lower) E21-40 (lower) E21-40 321-340 641-660 961-980 1281-1300 S
F (upper) F1-20 (lower) F1-20 341-360 661-680 981-1000 1301-1320 P
F (lower) F21-40 (lower) F21-40 361-380 681-700 1001-1020 1321-1340 S
G (upper) G1-20 (lower) G1-20 381-400 701-720 1021-1040 1341-1360 P
G (lower) G21-40 (lower) G21-40 401-420 721-740 1041-1060 1361-1380 S
H (upper) H1-20 (lower) H1-20 421-440 741-760 1061-1080 1381-1400 P
H (lower) H21-40 (lower) H21-40 441-460 761-780 1081-1100 1401-1420 S
Timing outputs (respectively)
S
P
S
P
FIGURE 8
Relationship of TH5500 shelf output modules, wire wrap panels, output circuits and P/S timing
Wire
wrap
panel
T/R/S
pin sets
P
S
P
P
Master
Exp
1 to 4
Shelf output
module
timing set
and position
(viewed from
shelf rear)
Shelf
Wire wrap
panel location
(upper or lower)
and connector
designations
S
P
S
Primary
(P) or
Secondary
(S) timing
9
BOTC-TEG-6760
9. System connection details:
A) Fuse panel:
Step 1 (Dual load redundant input feeders from BDFB): See BOTC-SEG-0500 section 11 for BDFB fuse/feeder
sizing responsibility and BOTC-SEG-0700 section 9 for wire material. Provide 4 two hole lugs (.25” studs on .625”
centers) for input feeder connections (wire size determined by vendor based on job conditions). Total LIST 2 for
TH5500 equipment is 13.63 amps (4.23 for master shelf, 2.35 for each of four expansion shelves). If an external
source unit is mounted in TH5500 rack 1, see BOTC-TEG-6700 TP1100 GPS, BOTC-TEG-6720 TS3500 GPS or
BOTC-TEG-6740 TC4500 Cesium Data Sheet for additional LIST 2 requirements.
Step 2 (Chassis ground): Provide 1 two hole lug (No.10 studs on .625” centers) for 6 AWG wire. Connect lug to
relay rack ground using 6 AWG wire (see BOTC-SEG-0700 section 7 and 9).
Step 3 (Alarms): Run 24 AWG Black and Red-Black wire pair (see BOTC-SEG-0700 section 8) from fuse panel R
set NO/C wire wrap pins to CO alarm system (Dantel for example) status point. No connection required for V and A
set pins.
B) Power for TH5500 master and expansion shelves:
Step 1 (intra-rack wiring): Connect TB1 BATTERY A -48V, RETURN and TB2 BATTERY B -48V, RETURN screws
to TH5500 rack 1 fuse panel output positions using 16 AWG Black/Red-Black wire pair (see BOTC-SEG-0700
section 8). Use Red-Black lead for -48V and Black lead for RETURN. Provide Thomas & Betts (or generic
equivalent) RB14-6 ring terminals for shelf end and RB484 ring terminals for fuse panel end. TH5500 rack 2 must
be adjacent to TH5500 rack 1 so that expansion shelf 3 and 4 can be powered from the rack 1 fuse panel.
Step 2 (fuse panel fuses and designation pins): Maximum drain is shown in part A. Shelf has special glass
cartridge internal 10 amp slow-blow fuses. Fuse externally at 10 amp so external fuses fail before internal fuses.
See BOTC-SEG-0500 section 14 for GMT fuse and designation pin part numbers.
C) Chassis ground for TH5500 master and expansion shelves:
Step 1 (intra-rack wiring): Connect TB1 BATTERY A ground symbol screw to relay rack ground using spare 16
AWG Black wire from part B. Provide Thomas & Betts (or generic equivalent) RB14-6 ring terminal for shelf end.
No connection required for TB2 BATTERY B ground symbol screw since internally common with TB1 screw.
D) Ethernet TL1 remote management for TH5500 master shelf:
This is the first choice method for remote management (see part E for second choice RS232 method if Ethernet hub
equipment not available in CO).
Step 1 (external remote management cable): Run electrical Ethernet cable with straight pinning (see BOTC-
SEG-0100 section 10) from TH5500 master shelf LAN RJ45 port (pin 1 is TX+, pin 2 TX-, pin 3 RX+, pin 6 RX-) to CO
Remote management Ethernet hub equipment port.
E) RS232 TL1 remote management for TH5500 master shelf:
This is an alternate second choice method for remote management (see part D for first choice Ethernet method).
Step 1 (external remote management cable): Run Black Box (www.blackbox.com) CBCC204261-XXX cable
(-XXX denotes footage) from TH5500 master shelf LOCAL port (DB9 female, DCE rated) to CO Remote management
AI Switch DP232-23 (asynch) port. See BOTC-SEG-0100 section 11.
F) Chassis ground for TH5500 wire wrap panel:
Step 1 (intra-rack wiring): Connect one of the two GND screws to relay rack ground using spare 16 AWG Black
wire from part B. Provide Thomas & Betts (or generic equivalent) RB14-8 ring terminal for panel end. This
provides a ground path for the wire wrap panel S punchings in part K. No connection required for other GND
screw both common.
10
BOTC-TEG-6760 G) Timing inputs for Initial TH5500 rack 1 master shelf:
Timing inputs for the Initial TH5500 rack 1 master shelf are obtained from MINI-DSX outputs in same relay rack
per BOTC-TEG-6700 section 8 part M (TP1100 GPS), BOTC-TEG-6720 section 5 part M (TS3500 GPS) or BOTC-
TEG-6740 section 5 part E (TC4500 Cesium).
Step 1 (intra-rack wiring): See BOTC-SEG-0100 section 9 for cable methods. Run two (primary and secondary)
single pair timing cables from TH5500 master shelf DS1 TERM IN pinfield (primary Tip lead to T1 pin, primary
Ring lead to R1, secondary Tip lead to T2, secondary Ring lead to R2) to MINI-DSX panel. Connect drain wire for
each cable to associated DS1 TERM IN S pin (cables are hard grounded at TH5500 end).
H) Timing inputs for Remote TH5500 rack 1 master shelf:
Step 1 (consult with Service Provider/Telco): Timing inputs for the Remote TH5500 rack 1 master shelf are
obtained from Initial TH5500 rack 1 master shelf outputs (see part K). All Remote rack 1 master shelves require
two (primary and secondary) CC timing cables. These CC cables provide the basic timing reference and have a
length limit of 1500’. Some jobs may also require (engineering vendors should consult with Service
Provider/Telco personnel) two DS1 timing cables between the Remote and Initial master shelves. These DS1
cables are used for extraction of optional Synch Status Message (SSM) signals and have a length limit of 655’.
Step 2 (CC cables): See BOTC-SEG-0100 section 9 for cable methods. Run two (primary and secondary) single
pair timing cables from Initial TH5500 rack 1 master shelf CC outputs (part K) to the Remote TH5500 rack 1
master shelf CC IN pinfield (primary LX lead to T1 pin, primary LY lead to R1, secondary LX lead to T2, secondary
LY lead to R2). Do not ground cables at Remote TH5500 rack 1 master shelf end since they are hard grounded at
the far end (S punching in part K).
Step 3 (optional DS1 cables): See BOTC-SEG-0100 section 9 for cable methods. Run two (primary and
secondary) single pair timing cables from Initial TH5500 rack 1 master shelf DS1 outputs (part K) to the Remote
TH5500 rack 1 master shelf DS1 TERM IN pinfield (primary Tip lead to T1 pin, primary Ring lead to R1, secondary
Tip lead to T2, secondary Ring lead to R2). Do not ground cables at Remote TH5500 rack 1 master shelf end since
they are hard grounded at the far end (S punching in part K).
J) TH5500 wire wrap panel connection to TH5500 master and expansion shelf output modules:
TH5500 shelves can be fully used for regular applications (all output modules cabled to TH5500 wire wrap panel
in same rack), fully used for retrofit applications (all output modules cabled to existing DCD/TSG wire wrap panels
per part M or N) or a dual application mixture of regular and retrofit (shelf output module cabling split between
TH5500 and DCD/TSG wire wrap panels on a custom basis).
Step 1 (intra-rack cables): 060-55591-02 cables (4’ long) are provided per section 3 part D, M or P. Run these
cables between TH5500 master and expansion output modules (rear side of shelf) and associated TH5500 wire
wrap panel front side connectors. See section 8 figure 8 for connector relationship.
K) Timing outputs for TH5500 wire wrap panel (associated with main or expansion shelf):
Step 1 (consult with Service Provider/Telco): Engineering vendors should consult with Service Provider/Telco
personnel about the planned DS1 versus CC ratio of section 3 part H and R output modules. Due to the unique NE
conditions in each CO, this will probably be a custom ratio on each TH5500 job.
Step 2 (connect timing cables from NEs as required): Each TH5500 wire wrap panel output port (see section 8
figure 8 for circuit count) has T, R, S pins. See BOTC-SEG-0100 section 9 for cable methods. Single pair primary
and secondary timing cables will be run to the TH5500 wire wrap panel as required from far end NE timing input
circuits. Connect Tip lead (if DS1) or LX lead (if CC) to T pin and Ring lead (if DS1) or LY lead (if CC) to R pin.
Connect drain wire for each cable to associated S pin (cables are hard grounded at TH5500 end). The total length
of these timing circuits (TH5500 to NE input) is limited to 655’ if DS1 or 1500’ if CC.
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BOTC-TEG-6760 L) Link cables for TH5500 expansion shelf: Step 1 (intra-system cables): Two 060-55505-01 cables (5’ long) are provided with each TH5500 expansion shelf per section 3 part M, N or P. For expansion shelf 1, 2 and 4, run these cables as follows: Expansion shelf 1 LINK 1 IN, LINK 2 IN connectors to master shelf LINK 1, LINK 2 respectively. Expansion shelf 2 LINK 1 IN, LINK 2 IN connectors to expansion shelf 1 LINK 1 OUT, LINK 2 OUT respectively. Expansion shelf 4 LINK 1 IN, LINK 2 IN connectors to expansion shelf 3 LINK 1 OUT, LINK 2 OUT respectively. For expansion shelf 3, discard the 060-55505-01 cables and use the two 060-55505-02 cables (10’ long) provided per section 3 part T. Run these cables as follows: Expansion shelf 3 LINK 1 IN, LINK 2 IN connectors to expansion shelf 2 LINK 1 OUT, LINK 2 OUT respectively. TH5500 rack 2 must be adjacent to TH5500 rack 1 since the overall system mult length (sum of link cables from expansion shelf 4 to 3, 3 to 2, 2 to 1, 1 to master shelf) is limited to 30”. Step 2 (line terminators): Two 190-55505-01 line terminators and one 128-55505-01 gender changer are provided with each TH5500 expansion shelf per section 3 part M, N or P. The last expansion shelf in a TH5500 system requires a line terminator in the LINK 1 OUT (male) and LINK 2 OUT (female) connectors. Since the line terminator is female, a gender changer must be used in the LINK 2 OUT connector. Line terminators are not required on the master shelf (if no expansion shelves in system) or on any intermediate expansion shelves.
M) Retrofit cabling from TH5500 master or expansion shelf to existing DCD wire wrap panel:
TH5500 shelves can be fully used for regular applications (all output modules cabled to TH5500 wire wrap panel
in same rack per part J), fully used for retrofit applications (all output modules cabled to existing DCD wire wrap
panels per part M) or a dual application mixture of regular and retrofit (shelf output module cabling split between
TH5500 and DCD wire wrap panels on a custom basis). See section 7 for retrofit methods. Symmetricom DCD-400,
DCD-523 and DCD-ST-2 wire wrap panels have special 10 circuit connectors. TH5500 master and expansion shelf
rear side output modules have 20 circuits. A single 20 circuit cable is used for the TH5500 to DCD relay rack run
with a short Y cable at the DCD end (upper legs of Y are 10 circuits each). Configuration of TH5500 output modules
(DS1 or CC? Primary or secondary?) must align with existing NE timing assignments on the DCD wire wrap panel.
Step 1 (interface cable): For each TH5500 master or expansion shelf output module that will be used for retrofit
of an existing DCD system, connect one 060-55591-02 cable (ordered per section 3 part U if no TH5500 wire wrap
panel or provided per section 3 part D, M or P if TH5500 wire wrap panel) to the output module.
Step 2 (cable to DCD rack): For each step 1 cable, provide one Telect (www.telect.com) 925-2533-0020-XXX
cable (-XXX denotes footage). Cable is 25 pair (20 active, 5 dead) 24 AWG shielded 1161A type (see BOTC-SEG-
0100 section 9 and 14) with Amp female connector on one end and Amp male on other end (both ends are 90
degree screw lock). Run female end of cable from TH5500 output module interface cable to DCD wire wrap panel
rack (male end of cable). Female connector has 3’ insulated drain wire that must be grounded at TH5500 rack. If
new TH5500 shelves and existing DCD wire wrap panels are in the same rack, 925-2533-0020-XXX cabling will be
a very short run within that rack.
Step 3 (Y cable within DCD rack): For each step 2 cable, provide one Symmetricom 060-00111-02 cable (54”
overall length). Cable has Amp 25 pair female on bottom leg of Y (connects to step 2 cable) and two 48” upper legs
with special 10 circuit female connectors (mates with DCD wire wrap panel). Bottom leg connector on Y cable has
a 3’ insulated drain wire that does not need to be connected since this is a short intra-rack run.
12
BOTC-TEG-6760 N) Retrofit cabling from TH5500 master or expansion shelf to existing TSG wire wrap panel:
TH5500 shelves can be fully used for regular applications (all output modules cabled to TH5500 wire wrap panel
in same rack per part J), fully used for retrofit applications (all output modules cabled to existing TSG wire wrap
panels per part N) or a dual application mixture of regular and retrofit (shelf output module cabling split between
TH5500 and TSG wire wrap panels on a custom basis). See section 7 for retrofit methods. Symmetricom TSG-
3800B wire wrap panels have 20 circuit connectors. TH5500 master and expansion shelf rear side output modules
have 20 circuits. A single 20 circuit cable is used for the TH5500 to TSG relay rack run. Configuration of TH5500
output modules (DS1 or CC? Primary or secondary?) must align with existing NE timing assignments on the TSG
wire wrap panel.
Step 1 (interface cable): For each TH5500 master or expansion shelf output module that will be used for retrofit
of an existing DCD system, connect one 060-55591-02 cable (ordered per section 3 part U if no TH5500 wire wrap
panel or provided per section 3 part D, M or P if TH5500 wire wrap panel)) to the output module.
Step 2 (cable to TSG rack): For each step 1 cable, provide one Telect (www.telect.com) 925-2533-0018-XXX
cable (-XXX denotes footage). Cable is 25 pair (20 active, 5 dead) 24 AWG shielded 1161A type (see BOTC-SEG-
0100 section 9 and 14) with Amp female connector on one end (90 degree screw lock) and Amp male on other end
(180 degree bail lock). Factory wiring in 925-2533-0018-XXX cable rolls Tip/Ring pair 1-10 and 11-20 pinout to
counteract the pair 1-10 and 11-20 roll with TSG-3800B wire wrap panels (panel connector to wire wrap pins for
each group). Run female end cable from TH5500 output module interface cable to TSG wire wrap panel (male end
of cable). Female connector has 3’ insulated drain wire that must be grounded at TH5500 rack. If new TH5500
shelves and existing TSG wire wrap panels are in the same rack, 925-2533-0018-XXX cabling will be a very short
run within that rack.
13
