Specifications

xix
Cisco 1751 Router Software Configuration Guide
OL-1070-01
Verifying Your Configuration
You can check the validity of your voice-port configuration by performing the following tasks:
• Pick up the handset of an attached telephony device and listen for a dial tone.
• Check for DTMF detection if you have a dial tone. If the dial tone stops when you dial a digit, the
voice port is configured properly.
• Use the show voice-port command to verify that the data configured is correct.
Step 7
type {1 | 2 | 3 | 5} Required Select the appropriate E&M interface type.
Type 1 is for the following lead configuration:
E—output, relay to ground
M—input, referenced to ground
Type 2 is for the following lead configuration:
E—output, relay to SG
M—input, referenced to ground
SB—feed for M, connected to –48V
SG—return for E, galvanically
isolated from ground
Type 3 is for the following lead configuration:
E—output, relay to ground
M—input, referenced to ground
SB—connected to –48V
SG—connected to ground
Type 5 is for the following lead configuration:
E—output, relay to ground
M—input, referenced to –48V.
Step 8
impedance {600c | 600r | 900c |
complex1 | complex2}
Required Specify a terminating impedance for an E&M
voice port. The impedance value selected
must match the specifications from the
telephony system to which this voice port is
connected.
Step 9
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.
Step 10
music-threshold number Optional Specify the threshold (in dB) for on-hold
music. Valid entries are from –70 to –30 dB.
The default is –38 dB.
Step 11
description string Optional Attach descriptive text about this voice-port
connection.
Step 12
comfort-noise Optional Specify that background noise is generated.
Command
Required /
Optional Task