this topic show the boards supported by the unified gateway.

Board

Device Model

Description

CVP

U1910/U1930

·   Provides the  softswitch functions.

·     Processes   media

control protocols.

·  Provides Layer

  2 switching and TDM

switching functions.

ASI

U1910/U1911/U1930/U1960/U1981

An ASI board connects the

 unified gateway to plain old telephone   service (POTS) phones. Each ASI board supports a maximum of 32 POTS phones.

OSU

U1910/U1911/U1930/U1960/U1981

An OSU board connects the unified gateway to POTS phones or analog   trunks. Each OSU board supports a

maximum of 12 POTS

phones or analog trunks.

SCU

U1911/U1960/U1981

A Service Control Unit (SCU) board functions as a

softswitch.   It processes

media control protocols and provides Layer 2 (L2) and

time   division multiplexing (TDM) switch functions. An SCU board supports   single-network-port, dual-network-port,

and

triple-network-port working   modes.

MTU

U1911/U1960/U1981

An MTU board provides digital trunk access for connection to   the upper-level office via

digital trunks. It also provides digit   collection,

announcement playing, recording, conferencing, TDM-to-VoIP   conversion, and T.30-to-T.38 fax functions.

BTU

U1911/U1960/U1981

A BTU board provides digital trunk access. Each BTU board   provides four BRI S/T ports and supports eight voice channels.

SMCU

U1980

Supports the following functions:

·           Provides the   softswitch functions.

·           Processes   media control protocols.

·           Supports three   working modes: single-network-port mode, dual-network-port mode, and   triple-network-port mode.

·           Provides Layer   3 switching and TDM switching functions.