3Com 3C63311 Reference Guide - Page 141

Configuring the Voice Compression Module 129 Figure 98 CBR Card Configuration Menu 4 Select [1] Set Admin Status and enter 2 to put the CBR card in service or 1 to take it out of service. Configuring the Voice Compression Module The optional Voice Compression module (VCM) consists of one T1/E1 interface which you connect to a PBX trunk. The T1/E1 interface's 24/31 DS0 channels can carry individual voice, fax, modem, or data connections-or you can bundle multiple DS0s to provide connections for high-rate applications such as video conference or multiple-link PPP. For CCS, a DS0 is used as an ISDN D-channel for carrying signal messages. Configuring the VCM involves the following tasks: n Configuring the channels n Configuring the T1/E1 port n Configuring the VCM card The following subsections describe these tasks. For details about configuring virtual circuits for the VCM, see "Configuring Virtual Circuits" later in this chapter. Configuring VCM DS0 To configure VCM DS0 channels, follow these steps: Channels 1 From the VCM Configuration menu, shown earlier in Figure 100, select [1] Channel Configuration. The following prompt appears: Enter Channel (1-8): 2 Enter the number of the channel you want to configure. After you enter the channel number, the VCM Channel Configuration menu opens. Figure 99 shows a representative VCM Channel Configuration menu.