Cisco Cisco Voice Interface Cards Technical Manual

For configuration of Voice features in Cisco IOS Software, refer to 

Voice over IP for the Cisco 3600 

Series

.  

Note:  In Cisco IOS Software, issue the voice-port <slot>/<VIC slot>/<unit> global configuration 
command to configure the voice port parameters. 

The commands to configure Voice over IP (VoIP) on Cisco routers are very similar on all of the 
router platforms shown here. 

For configuration of voice features in Catalyst OS (CatOS) on a Catalyst 4000, refer to 

Configuring 

Voice Interfaces

. 

Note: The table that follows has been split due to spatial concerns. 

Defintions:  

z

Pinouts for Rolled RJ11 Cable => 
TIP to RING, RING to TIP 

z

Pinouts for Straight RJ11 Cable=> 
TIP to TIP, RING to RING  

Note:  FXS ground-start services are 
polarity-sensitive and undesirable 
behavior, such as failed calls, can occur if 
proper polarity conventions are not 
observed. 

Cisco IOS® 
Software 
Feature Set 

Requires a "Plus" or “IPVOICE” feature 
set.  

NM-1V 
NM-2V

  

NM-1V 
NM-2V

  

NM-1V 
NM-2V

  

NM-HD-
1V, NM-
HD-2V, 
NM-HD-
2VE

  

NM-
HDV2

  

All 
versions 

All 
Versions 

12.1(3)T, 
12.1(3)T 

All 
Versions 

All 
Versions 

Not 
Supported 

Not 
Supported

Not 
Supported 

12.2(15)
ZL, 12.3
(4)T, 
12.3(4)

Not 
Supported

Not 
Supported

Not 
Supported

12.2(15)
ZJ, 12.3
(4)T 

12.3(7)T