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
Channels
To configure VCM DS0 channels, follow these steps:
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.
