CISCO 2911 voice service voip ip address trusted list

[UnivoiceLLC]

I am trying to configure a cisco 2911 like my 3800 series but noticed that the command 

voice service voip
 ip address trusted list
  ipv4 x.x.x.x

is not there.   How can I setup a trusted list to be able to make calls over the 2911?

[rm760]

What is your version of IOS?  A version with voice services is required. 

[UnivoiceLLC]

flash0:c2900-universalk9-mz.SPA.150-1.M8.bin

[acampbell]

Hi,

You need to upgrade your IOS to 
15.1(2)T or later

see this url for more info
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucme/admin/configuration/guide/cmeadm/cmetoll.pdf

This affects both voice gateways & CME

Regards
Alex