4-23
T1/E1 Digital Voice Port Adapter Installation and Configuration
OL-3592-02
Chapter 4 Configuring the PA-VXA, PA-VXB, and PA-VXC
Configuring Voice over IP
Configure FXO or FXS Voice Ports
Under most circumstances, the default voice-port values are adequate for both FXO and FXS voice ports.
If you need to change the default configuration for these voice ports, perform the following tasks. Items
included in Step 1 and Step 2 are required; items included in Step 3 are optional.
Step 1
Identify the voice port and enter the voice-port configuration mode by using the voice-port command.
Step 2
Configure the following mandatory voice-port parameters by using the indicated commands:
•
Dial type (FXO only) using the dial-type command
•
Signal type using the signal command
•
Call progress tone using the cptone command
•
Ring frequency (FXS only) using the ring frequency command
•
Ring number (FXO only) using the ring number command
Step 3
Configure one or more of the following optional voice-port parameters by using the indicated
commands:
•
PLAR connection mode using the connection plar command
•
Music threshold using the music-threshold command
•
Description using the description command
•
Comfort noise (if VAD is activated—vad is a dial-peer command) using the comfort-noise
command
To configure FXO and FXS voice ports, use the following commands beginning in privileged EXEC
mode:
Command
Purpose
Step 1
configure terminal
Enter the global configuration mode.
Step 2
voice-port
slot-number/subunit-number/port
Identify the voice port you want to configure and enter the
voice-port configuration mode.
Step 3
dial-type {dtmf | pulse}
(For FXO ports only.) Select the appropriate dial type for
out-dialing.
Step 4
signal {loop-start |
ground-start}
Select the appropriate signal type for this interface.
Step 5
cptone country
Select the appropriate voice call progress tone for this interface.
The default for this command is us. For a list of supported
countries, refer to the Voice, Video, and Home Applications
Command Reference.
Step 6
ring number number
(For FXO ports only.) Specify the maximum number of rings to
be detected before answering a call.
Step 7
connection plar string
(Optional.) Specify the Private Line Auto Ringdown (PLAR)
connection if this voice port is used for a PLAR connection. The
string value specifies the destination telephone number.
