We help IT Professionals succeed at work.

pvdm on a 2911

Am I correct in saying that voice ports will not work on a 2911 without at least 1 pvdm3 installed?
Comment
Watch Question

Depends on your hardware:

http://www.cisco.com/c/en/us/support/docs/voice/call-routing-dial-plans/22377-e-doc-voice-card-recognition.html#dsps

you can review what you have on your 2911 with the command <show inventory>

Commented:
You need PVDMs if you are connecting to the PSTN via analog or ISDN lines.  If you have a SIP connection to your telco profider, you only need PVDMs for any transcoding you may require(but you need a CUBE license and a CUBE enabled IOS version).