Large Enterprise with Multiple Locations

Source: Avaya

• An Avaya S8100 Media Server, networked to an Avaya S8700 Media Server, could be

• implemented that executes Avaya MultiVantage Software locally, but accesses the centralized

• communications applications, such as messaging, over the WAN. The Avaya S8100 Server is

• integrated with the Avaya G600 Media Gateway to provide trunk access to the PSTN for local

• calling.

• Alternatively, the enterprise could install an Avaya G700 Media Gateway and utilize the system at

• the main site to provide both Avaya MultiVantage Software capabilities and communications

• applications over the WAN. In this case, the Avaya G700 Gateway could be equipped an Avaya

• S8300 Server module with a Local Survivable Processor (LSP). In the event of a WAN link failure,

• Headquarters system failure, or extreme congestion, the Avaya S8300 Server would immediately

• activate and run Avaya MultiVantage Software locally to maintain the remote site functionality.

Mid-to-Large Enterprises

Source: Avaya

• The Avaya ECLIPS distributed architecture can also be applied to a campus network for a mid to large

• enterprise, as depicted in Figure 18. In this example, the enterprise has installed the S8700 Media

• Server at one location on the campus and deployed Avaya G600 Media Gateways at other main buildings

• on the campus. These modules are networked over the campus LAN. An Avaya G600 Media Gateway

• could also be installed at a remote location that is not located on the campus. In this case, the remote

• gateway is connected over the enterprise WAN. The enterprise could also deploy the Avaya G700

• Media Gateway with survivability at the remote location.

• Roaming users can communicate with this system in two ways. The AvayaTM EC500 Extension to

• Cellular transparently bridges calls received at a user’s desktop phone to the user’s digital cellular phone.

• In addition, call bridging allows a person to continue an Avaya EC500 cellular call at their desk, seamless

• switching the call from the cell phone to the desktop set. The AvayaTM IP Softphone for Pocket PC

• provides access to the office telephone features, similar to the Avaya IP Softphone on a PC/laptop. The

• connectivity to the enterprise communications system is via the 802.11b wireless LAN. The Avaya PDA

• Softphone for Pocket PC supports PDA devices using Windows Pocket PC 2000 and 2002.

Small to Medium Enterprises

Source: Avaya

• A small to mid-sized enterprise with multiple locations can also take advantage of the networking

• capabilities that Avaya ECLIPS offers. The Avaya S8300 Media Server, in combination with Avaya G700

• Media Gateways at remote locations, can serve up to 450 users. As shown in Figure 19, the Avaya

• S8300 Server at the main location is integrated with the Avaya G700 Media Gateway, which can provide

• access to the PSTN and support for digital or analog devices. The gateways at the remote locations

• would be connected to the S8300 Media Server over the enterprise WAN. Each of these remote Avaya

• G700 Gateways could be equipped with the Local Survivable Processor (LSP) processors. This would

• enable the remote system to continue to operate if the WAN were to fail or become extremely congested.

Simple VoIP Application

Source: Adtran

Power over Ethernet Solutions

Source: Adtran

VoIP Considerations

Switches Routers Switch/RoutersNetVanta 3000NetVanta 4000NetVanta 5000

Layer 2802.1Q VLAN Tag/Trunk 802.1p Ethernet PriorityWeighted Round Robin QueingStrict Priority Queuing

Layer 3Inter-VLAN RoutingDiffServ Awareness Weighted Fair Queuing (WFQ) Low Latency Queuing (LLQ) Frame Relay Fragmentation

SecurityVLAN Segmentation SIP/H.323 ALGs DiffServ Preservation in IPSec

NetVanta 1224NetVanta 1224ST

NetVanta 1224RNetVanta 1224STR

VoIP Migration: Before

VoIP Migration: After

Source: Adtran

Analog Telephony Setup: Before

Source: Adtran

Analog Telephony Setup: After

Source: Adtran