130 CHAPTER 4: CONFIGURING PATHBUILDER S330/S310 MODULES, PORTS, AND APPLICATIONS
Figure 99 VCM Channel Configuration Menu
3 Set the following channel configuration parameters:
Encoding—Encoding scheme: A-law (United States) or Mu-law (international).
Voice Coding—Voice compression algorithm: Clear data, 64kbps PCM, 40kbps
ADPCM, 32kbps ADPCM, 24kpbs ADPCM, 16kbps ADPCM, or 8kbps G.729A.
Silence Compression—Enable (On) or disable (Off) silence compression and
comfort noise injection. If you enable Silence Suppression, the system will
automatically insert comfort noise when it detects silence in the voice
transmission.
Echo Cancellation—Enable (On) or disable (Off) echo cancellation. If you enable
Echo Cancellation, the DSP will perform up to 16ms echo cancellation.
DTMF Relay—Enable (On) or disable (Off) DTMF Relay. If you enable DTMF Relay
the Voice Compression module sends DTMF using a different packet. If you disable
DTMF Relay, the Voice Compression module simply compresses the voice signal.
FAX Support—Enable (On) or disable (Off) FAX relay. If you set FAX Support to
On, the system modulates and demodulates the fax and transfers fax data.
4 Select [7] Apply Setting to Channel(s) to apply your settings to one or more
channels. The following prompt appears:
Enter Channel(s) (1-8):
5 Enter the number(s) of the channel(s) to which you want to apply the settings. You
can enter a single channel, a range of channels (for example: 4-6), or a list of
channels separated by commas (for example: 4,5,6).
Configuring the VCM
T1/E1 Port
To configure the VCM T1/E port, follow these steps:
1 From the Main menu, select [2] Configuration Management to open the
Configuration Management menu, shown earlier in Figure 50.
2 From the Configuration Management menu, select [1] Manage Card to open the
List Card menu, shown earlier in Figure 51.
