Yes you should be able to do this, configure the a dial-peer with session protocol sipv2 for the ITSP and the address. Under sip-ua configure username/password/realm needed for http digest authentication to the ITSP.
If the GSM adapter is capable of registration and authentication, configure "voice register pool xx" again with username and password. A mac addrss is required but can be all zeros.
If not capable of registration, configure a static dial-peer similarly to the one mentioned above.
Can you share details on the type of GSM adapter you are using supporting SIP ?
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The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...