Specifications

Overview
24 Hardware Description and Reference for Avaya Communication Manager
for example, IPSI, expansion interface, and IP Media Resource 320 circuit packs, control
D-channels, and remote management terminals.
● Port circuits. The port circuits form analog or digital interfaces between the media
gateway and external trunks and linking devices. These linking devices provide links
between the gateway and external trunk and the TDM bus and the packet bus. Incoming
analog signals are converted to pulse-code modulated (PCM) digital signals and placed on
the TDM bus by port circuits. Port circuits convert outgoing signals from PCM to analog for
external analog devices. All port circuits connect to the TDM bus. Only specific ports
connect to the packet bus.
● Interface circuits. Interface circuits allow the media server to:
- communicate with the media gateways
- connect two or more media gateways together
- connect port networks together via switch nodes
Interface circuits with traditional server architectures use optical fiber for the connections.
The S8500 Media Server and S8700-series Media Server architectures also use optical
fiber for connecting media gateways together. But they also use Ethernet connections from
the servers to the connected media gateways. The S8300 Media Server uses Ethernet
connections exclusively to connect to the media gateways.
● Service circuits. For traditional servers, S8500 Media Servers, and S8700-series Media
Servers, service circuits provide tone production and detection, call classification,
recorded announcements, and speech synthesis. The S8300 Media Server uses built-in
service circuits in the G250, G350, and G700 Media Gateways.
Port networks
The architectures for DEFINITY servers, the S8500 Media Server, and the S8700-series Media
Server use an entity called a port network (PN). A PN uses combinations of media gateways to
provide physical ports and interfaces for handling calls. A port network can be one of the
following:
● One single-carrier media gateway: G600, G650, CMC1, or SCC1
● A stack of single-carrier media gateways that are connected with a TDM bus cable and
share connections to the media server or port circuit packs
● An individual carrier or a set of TDM cable-connected carriers housed within the MCC1
media gateway
Note:
Note: The G700, G350, and G250 Media Gateways are controlled by a Communication
Manager Media Server via H.248 and are not considered port networks.
However, they may reside within a configurations including port networks.