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Following is a review of the network elements for VoIP service
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VoIP
Key terms about VoIP
H.323
SIP
CODECs
G.711
G.729
G.723
FXS and FXO
Gateway
T.38 FAX
These are what
everyone talks about
What is VoIP…the technology
• Voice over IP (VoIP) samples 10 – 60ms of voice with an Analog-to-Digital conversion process (CODEC). This is similar to the way the phone company does it today with PCM (Voice over T1/E1).
• These samples are placed into an IP packet and sent over the network.
• A far-end device reassembles the voice stream on the other side.
IP Network
Internet
VoIP
Gateway
Analog or
Digital voice
circuit
VoIP
Gateway IP Packets with Voice Samples
Analog or
Digital voice
circuit
Typical VoIP System Elements
IP Network
PSTN
Terminals
IP Phone
Multimedia PC
Gateways
• PSTN, ISDN
• V5, SS7
Softswitch
• Gatekeeper
• Call-Manager
• Softswitch
• Network-Server
• Network Interworking
• Signaling Conversion
• Media Conversion
• Packetization and reassembly
• ISDN, PSTN, V 5.2, SS7
• Client Registration
• Authentication
• Status
• Number Mapping
• Accounting
• User Interaction
• Dial-tone, Ringtone, etc
• Registers with Call Control
• Media Conversion
VoIP Technology: Media Standards
G.711
G.726
G.729
G.723 @ 6.3
GSM-EFR
Comments
Toll quality, full rate, lowest delay
Free: good compromise
Licensed: best compromise
Licensed: low bandwidth
For Reference: mobile phones
Codec Codec
Rate
[kb/s]
64
16 - 40
8
6.3
12.2
IP BW/Call
one way
[kb/s]
96
32 - 56
24
17
-
Recommend G.711 if no bandwidth limitations apply!
Toll Quality
Low Delay
Best all around!
Packet
Length
[ms]
10/20
20
20
30
Various CODECs are used for voice compression:
Fax over IP: watch out for this
1) Fax Relay, T.38
IP
A/D D/A
Fax Bypass, T.30 Fax over G.711, 96Kb
Fax-Relay, T.38 packets
2) Fax Bypass, G.711
T.30 Fax T.30 Fax
The Fax tones are terminated in the gateway, relayed in packet form and re-modulated at the far end. + Uses less bandwidth + Is reliability(offers redundancy) - Is less interoperable
The Fax is carried in a G.711 voice channel just like a regular phone call. + Is interoperability with any gateway - Uses more bandwidth
- Is less reliability
Signalling Standards Snapshot
Signaling protocols defines how VoIP equipment communicate to actually
set-up, establish and release telephone calls over IP networks. For
example – Ring, Talk and Hang-up.
H.323
The oldest and most widely supported call control protocol.
Current Version is v4 (we support it now!)
Is actively enhanced by the international standards community
Offers the most interoperability between 3rd party equipment.
Business focused
SIP
The newest of the call control protocols
IETF (Internet based); looks like html; most extendable
Messaging for all types of user devices (phones, PC, GSM)
Carrier/CLEC focus
We support it today!
MGCP
Oriented towards softswitch carrier architectures
Focuses on the central site over CPE
Supported in SmartNodes today!
VoIP Terms Defined (1)
Softswitch
Call control and route server in a VoIP network providing user AAA services and intra-network call switching. This is Independent of the VoIP protocol (H.323, MGCP, SIP).
Gatekeeper (GK)
H.323 specific term. The GK is responsible for the management of the users (clients) and gateways in his H.323 area (zone). Implemented as software on a server or integrated as a function in a Gateway.
Gateway (GW) (This is what SmartNodes do!)
Signaling or Media-Gateway (may be combined in one equipment) provides conversion between different networks-protocols or technologies.
H.323 Client
Terminal in an H.323 network. IP-Phone or Soft-Phone (e.g. NetMeeting).
AAA
User Authentication, Authorization, Accounting. Required functions for a commercial VoIP Service. Carrier centric and provided by Gatekeeper.
VoIP Terms Defined (2)
RAS
Registration Authentication Status: H.323 Sub-protocol used to register “log-in” an
H.323 Gateway or Client at the Gatekeeper
SIP User Agent
SIP Equipment or software representing an end-user. The user agent includes a a
SIP client (to initiate calls) and SIP server (to terminate calls). This is “inside” a
SmartNode gateway.
SIP Network Server
SIP Equipment or software in the network required to register and localize User
Agents and their end-users. A SIP Network Server can operate in redirect or proxy
mode. This is a server box routing calls.
Telephony Terms
THESE YOU HAVE TO KNOW!
BRI, S0, S/T 2 B + 1 D channel > 2 voice connections
E1, PRI, S2m 30 B + 1 D channel > 30 voice connections
T1, PRI 23 B + 1 D channel > 23 voice connections
FXS “phone jack”, 2-wire POTS interface
FXO “line jack”, 2-wire POTS interface
Switch
NT BRI/PRI
TE
FXO
2-wires
4-wires 4-wires
FXS
2-wires
Switch
FXS FXO
IP
ISDN
POTS
TE
IP
NT
Building Blocks for QoS (2)
A Shaper can limit a Traffic Class to a defined bandwidth
Frees Bandwidth for real-time (voice) traffic without packet loss
Improves the Performance of interactive Applications
Very usefull for short connections e.g Web requests
WWW SH
For Example: Traffic Shaping
max
Data Burst
Web-Page
voice
unused
Data Burst
Web-Page
voice
unused
Data Burst
Web-Page
max
t t
Bandwidth Bandwidth
The integration of QoS Router and VoIP Gateway makes things
much easier
• Traffic Classes are defined at network interfaces
• No tagging necessary for point-to-point links
• Optimal bandwidth usage and control
LAN LAN WAN Link
Q
GW
Q
GW
Classification
Conditioning
Marking
Smart combination of QoS and VoIP
Products
Patton VoIP products
SIP ATAs SmartLink
4020 Series
Multiport FXS/FXO
VoIP Gateways SmartNode 4110 Series
SIP Phones SmartLink 4050
Multiport FXS/FXO
VoIP Routers SmartNode 4520 Series
Modular VoIP Routers SmartNode 2000 Series
Multiport ISDN
VoIP Routers SmartNode 1000 Series
SIP IP PBX SmartLink 4520
Up to 200 Extensions
Voice Mail, voice to e-mail
Web Configured
Multiport FXS/FXO
SyncSerial VoIP IADs SmartNode 4830 Series
Multiport FXS VoIP GWs SmartNode 4900 Series
SOHO ISDN
VoIP Router SmartNode 4552 Series
New Products: SmartNode™ 4110 Series
• SN4112, SN4114, SN4116, SN4118
• 2-8 port analog VoIP Gateway
• 2/4/6/8 2-wire FXS ports
• 2/4 2-wire FXO ports
• 10/100bTx Ethernet LAN connection
• Console Port: RS-232 RJ45
• QoS support
• TOS, DiffServ
• 802.1p
• PPPoE client, DHCP client
• Memory 32MB SDRAM / 4MB Flash
• Integrated or external universal power
supplies
• 100-240 VAC (50/60 Hz)
• Desktop Chassis
• CE mark, EN 60950
FXS/FXO ToIP Media-Gateway
When to use...
Use the SN4100 series to
integrate analog terminals –
phones and PBXs – in to VoIP
networks
SmartNode™ 4520 Series
• SN4112, SN4114, SN4116, SN4118
• 2-8 port analog VoIP Gateway
• 2/4/6/8 2-wire FXS ports
• 2/4 2-wire FXO ports
• Dual 10/100bTx Ethernet LAN/WAN
• Console Port: RS-232 RJ45
• Full QoS support
• TOS, DiffServ, 802.1p
• Traffic Management
• Full featured IP-Router
• NAT/PAT, PPPoE, DHCP, ACL,
QoS
• Memory 32MB SDRAM / 4MB Flash
• Integrated or external universal power
supply
• 100-240 VAC (50/60 Hz)
• Desktop Chassis
• CE mark, EN 60950
Dual Ethernet ToIP Router-Gateway
When to use...
Use the SN4500 Series as an
CPE Access Gateway for analog
voice and data on any
broadband access; Cable, DSL
or WLL
NEW: SmartNode™ 4552
10/100 Ethernet WAN For universal connectivity to DSL, Cable, WLL or Fiber uplinks
4 port Ethernet Switch 10/100bTX For SOHO LAN connectivity. Connect PC, Printer, WiFi Bridge without extra hub or switch
2 ISDN BRI/So ports Insert the Gateway between your installed ISDN Terminals and the ISDN NT for simple installation and universal call routing
Life-Line Bypass A bypass Relay connects the local ISDN port directly to the fallback line in case of power failures.
The SmartNode™ 4552 is a Voice over IP CPE for ISDN BRI/So users. It
combines a feature rich Broadband Access Router with advanced Quality of
Service features and high-quality VoIP for ISDN Terminals.
SmartNode™ 1200 / 4552 Typical Installation
Example of an Installation with a DSL Access
Splitter DSL Modem
ISDN NT
Copper
Ethernet
10bT
ISDN S/T
Internet Access
VoIP Access
ISDN Fallback
ADSL Annex B
SmartNode™ 1400
When to use...
Use the SN1400 for dual ISDN
BRI PBX networking or LAN
gateway. Stack for n x BRI.
Integrated Broadband Access Router
and VoIP Gateway
• 4-Channel VoIP Gateway
• 2 ISDN BRI NT/TE configurable
• Lifeline: Bypass switch between BRI
Ports
• LAN/WAN: 2 x 10bT Ethernet
• Console Port: RS-232 RJ45
• Full featured 10 Mb/s Broadband Access
Router
• NAT/PAT, ACL/FW, PPPoE, DHCP,
QoS
• CPU Motorola MPC850 @ 50 MHz
• Memory 16MB SDRAM / 4MB Flash
• Integrated universal power supply
• 100-240 VAC (50/60 Hz)
• Desktop and Wall-mount Chassis
• CE mark, EN 60950
• Optional Line Power with PM-BRI-ext
SmartNode™ 1400/4634 Typical Installation
Example of an Installation for PBX Networking with 4
simultaneous VoIP calls
Data Network
PSTN
Site A Site B
VoIP Network
DSL Modem
2 x ISDN S/T
SmartNode™ 2300
Up to 60 VoIP channels (2xPRI)
10/100bT LAN
10bT WAN or DMZ
X.21/V.35 Serial WAN port
3 PMC Expansion slots
ISDN PRI, BRI and FXS ports with respective
Interface Cards
Full featured 10Mb/s Wire speed routing
NAT/PAT, ACL/FW, DHCP, PPP, FR,
QoS
CPU Motorola MPC860 @ 50 MHz
Memory 16MB SDRAM / 8MB Flash
Internal power supply: 100-240 VAC (50/60
Hz)
19” 1HU Desktop or Rackmount chassis
• CE mark, EN 60950
• Optional Line Power with PM-40V-int
When to use...
Use the SN2300 with up to 60
VoIP channels as enterprise
CPE or PBX networking
gateway
Modular Serial/Ethernet Access
Router and VoIP Gateway
SmartNode™ 2300 Interfaces
3 Interface Card Slots
• PMC Format
• PCI (packet) interface
• PCM (circuit) interface
ETH 0/0
Ethernet
10baseT
WAN or DMZ
Console: RS-
232, RJ45
Serial 0/0
X.21, V.35
WAN port for
PPP, FR
Router
ETH 0/1
Ethernet
10/100bTX
LAN
Data Access Voice Access
SmartNode™ 2400
Up to 120 VoIP channels (4xPRI)
Dual 10/100bT LAN/WAN
Full featured 100Mb/s Wire speed routing
NAT/PAT, ACL/FW, DHCP, PPPoE
CPU Motorola MPC750 @ 333 MHz
Memory 32MB SDRAM (upgradable) /
8MB Flash
19” 1HU desktop or rack-mount alu-
chassis
Internal power supply: 100-240 VAC
(50/60 Hz)
• CE mark, EN 60950
• Optional Line Power available with power
module: PM-BRI-ext When to use...
Use the SN2400 with up to 4 IC-
E1V/T1V and 120 VoIP
channels as CO gateway
Modular Ethernet Access Router and
VoIP Gateway
4 Interface Card Slots
• PMC Format
• PCI (packet) interface
• PCM (circuit) interface
SmartNode™ 2400 Interfaces
Console: RS-
232, RJ45
ETH 0/0 and 0/1
FastEthernet
10/100bTX
LAN or WAN
SmartNode™ Interface Card IC-E1V
30-channel VoIP Gateway Card
1 ISDN PRI E1, S2m port
NT or TE configurable
Full Codec and Fax over IP support
G.711, G.726, G.729, G.723
T.38 Fax-Relay
G.711 Fax-Bypass
Echo Cancellation, DTMF Relay
PMC standard form factor
No E1 data on this card
ISDN Primary Rate interface
Card for SmartNode 2000
Series
When to use...
Use the IC-E1V for PBX
networking in a CPE or as
concentrator port in the CO
gateway.
Use up to 2 in 2300 and 4 in
2400
SmartNode™ Interface Card IC-T1V
24-channel VoIP Gateway Card
1 ISDN PRI port
NT or TE configurable
Full Codec and Fax over IP support
G.711, G.726, G.729, G.723
T.38 Fax-Relay
G.711 Fax-Bypass
Echo Cancellation, DTMF Relay
PMC standard form factor
Signaling ISDN NI-2
ISDN Primary Rate interface Card for
SmartNode 2000 Series
When to use...
Use the IC-T1V for PBX
networking in a CPE or as
concentrator port in the CO
gateway.
Use up to 2 in 2300 and 4 in
2400
SmartNode™ Interface Card IC-4BRV-8V
8-channel VoIP Gateway Card
4 ISDN BRI, So, S/T ports
configurable NT/TE
• Configurable pt-pt / pt-mpt
Full Codec and FoIP support
G.711, G.726, G.729, G.723
T.38 Fax-Relay
G.711 Fax-Bypass
Echo Cancellation, DTMF Relay
PMC standard form factor
Optional Line Power with PM-48V-int
4 Port ISDN Basic Rate interface
Card for SmartNode 2000 Series
When to use...
Use the IC-4BRV-8V ISDN BRI
PBX networking with call routing
and local PSTN breakout.
SmartNode™ Interface Card IC-4FXS
4 Port FXS Interface Card for
SmartNode 2000 Series
4-channel VoIP Gateway Card
4 Euro POTS ports
2-wire FXS loopstart
Full Codec and FoIP support
G.711, G.726, G.729, G.723
T.38 Fax-Relay
G.711 Fax-Bypass
Echo Cancellation, DTMF Relay
PMC standard form factor
Requires power module PM-48V-int to be installed inside 2300 or 2400 for line and ring power
When to use...
Use the IC-4FXS for analog
phones or PBX systems at the
CPE
SmartNode™ 4960
It is not modular!
1E1
4E1
VoIP license from 15 to 120 channels
PROMOTION UNTIL END OF OCTOBER:
You pay one and we give two
VoIP Applications
IP Telephony in the LAN
Enterprise networking with VoIP
Multi-Service Carrier Access
Applications in the Provider Market
Multi-Service Broadband Access
Bind Customers through Service
Differentiation
Bind Customers with Bundled Services
Cut Operation Costs through Converged
Service Delivery
PSTN
Provider Backbone
Internet
Services
Application
Services
Voice
Services
Customer Networks
SmartNode
Customer Premises
Gateways
WLL
xDSL
CATV Leased Lines
BB Access
PowerLine
Applications in Enterprise Networks
Global Enterprise Communications
IP Network
Internet
PSTN
Main Office Branch Office
• Cut WAN costs in office to office communication
• Long distance and international toll bypass
• Telephony integration of Home Offices
• Telephony integration of remote branches
SmartNode SmartNode
PBX Extensions
Ethernet LAN
PBX Networking Installation (1)
Equipment
• SmartNode 2300 with 2 x IC-4BRV
• SmartNode is used as Gateway, Router and Switch
• 100bT LAN
• Serial WAN
Site A Site B
TVA PBX PSTN
4 x BRI
4 x BRI
2 x BRI 2 x BRI
100bTX
leased line
X.21 X.21
PBX Networking Installation (2)
Customer Benefits
• Interoffice Toll Bypass based on legacy PBX installation
• Telephony, Internet Access and VPN with a single device
SN4528 SN4114
SN4526
IP/WAN/VPN
WWW 8-lines 4-lines
6-lines
PLAR – Private Line / Hot line
Customer Benefits
• Toll free hotline service over existing Data network Infrastructure
• Connectivity on any IP network
SN4114 SN4114
IP/WAN/VPN
WWW
Enterprise Home Office PBX Extension
Main Office
LAN
Gatekeeper
Public Gateway
SN1400
PBX
Router
NAT
Firewall
Internet
PSTN
Home Office
BRI
BRI
Modem
Modem
2 xBRI
5 xBRI
SN1200
Enterprise Opportunity Analysis
Multiple PBXs at different sites
The sites are already connected to the Internet with sufficient bandwidth (50 to 100k per voice connection), or a
connection can be established easily. (e.g. Leased Lines, DSL, Cable Modem, Laserlink, WiFi etc.)
Remote
Offices without
PBX
The PBXs are already
networked using QSIG
The PBXs are not networked. Calls
between sites go through the PSTN
SmartNode Solution: toll
bypass over IP. Save on
the monthly telefone bill.
SmartNode Solution:
QSIG networking over
IP. Save the cost of
dedicated leased lines.
SmartNode Solution :
remote sites are served
as IP extensions of the
central PBX.
Check if it is a SmartNode Opportunity?
Home Office
Access to
central PBX
Condition
Requirement
Environment
Solution