Datasheet

Configuring Voice Ports
Configuring Digital Voice Ports
VC-79
Cisco IOS Voice, Video, and Fax Configuration Guide
The voice port tuning commands are grouped into these categories and explained in the following
sections:
• Auto Cut-Through Command, page 79
• Bit Modification Commands for Digital Voice Ports, page 79
• Calling Number Outbound Commands, page 81
• Disconnect Supervision Commands, page 82
• FXO Supervisory Disconnect Tone Commands, page 85
• Timeouts Commands, page 87
• Timing Commands, page 89
• DTMF Timer Inter-Digit Command for Cisco AS5300 Access Servers, page 90
• Voice Quality Tuning Commands, page 92
Full descriptions of the commands in this section can be found in the Cisco IOS Voice, Video, and Fax
Command Reference, Release 12.2.
Auto Cut-Through Command
The auto-cut-through command allows you to connect to PBXs that do not provide an M-lead response.
To configure auto-cut-through, use the following command in voice-port configuration mode:
Bit Modification Commands for Digital Voice Ports
The bit modification commands for digital voice ports modify sent or received bit patterns. Different
versions of E&M use different ABCD signaling bits to represent idle and seize. For example, North
American CAS E&M represents idle as 0XXX and seize as 1XXX, where X indicates that the state of
the BCD bits is ignored. In MELCAS E&M, idle is 1101 and seize is 0101. The commands in this section
are provided to modify bit patterns to match particular E&M schemes.
To manipulate bit patterns for digital voice ports, use the following commands as necessary, in voice-port
configuration mode:
Command Purpose
Router(config-voiceport)# auto-cut-through
(E&M only) Enables call completion on a router when a PBX
does not provide an M-lead response.