Datasheet

Configuring Voice Ports
Configuring Digital Voice Ports
VC-80
Cisco IOS Voice, Video, and Fax Configuration Guide
Command Purpose
Step 1
Router(config-voiceport)# condition {tx-a-bit |
tx-b-bit | tx-c-bit | tx-d-bit}{rx-a-bit | rx-b-bit |
rx-c-bit | rx-d-bit} {on | off | invert}
Manipulates sent or received bit patterns to match
expected patterns on a connected device. Repeat
the command for each transmit and/or receive bit
to be modified, but be careful not to destroy the
information content of the bit pattern.
The default is that the signaling format is not
manipulated (for all transmit or receive A, B, C,
and D bits).
The keywords are as follows:
• on—Sets the bit to 1 permanently.
• off—Sets the bit to 0 permanently.
• invert—Changes the state to the opposite of
the original transmit or receive state.
Note The show voice port command reports at
the protocol level, and the show
controller command reports at the driver
level. The driver is not notified of any bit
manipulation using the condition
command. As a result, the show
controller command output does not
account for the bit conditioning.
Step 2
Router(config-voiceport)# define {tx-bits | rx-bits}
{seize | idle} {0000 | 0001 | 0010 | 0011 | 0100 |
0101 | 0110 | 0111 | 1000 | 1001 | 1010 | 1011 | 1100
| 1101 | 1110 | 1111}
(Digital E1 E&M voice ports on Cisco 2600 and
3600 series routers and Cisco MC3810
multiservice concentrators only) Defines specific
transmit or receive signaling bits to match the bit
patterns required by a connected device for North
American E&M and E&M MELCAS voice
signaling, if patterns different from the preset
defaults are required.
Also specifies which bits a voice port monitors
and which bits it ignores, if patterns that are
different from the defaults are required.
See the define command for the default signaling
patterns as defined in American National
Standards Institute (ANSI) and code excited linear
prediction compression (CEPT) standards. The
keywords are as follows:
• tx-bits—Indicates the pattern applies to
transmit signaling bits.