IP Telephony and Phones

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Resolved! SIP TLS Trunk

Hello everyone! I need to configure SIP TLS trunk between my CUBE and ITSP. Do i need to use PVDM, for conversion SRTP>RTP and back ? If i need to use PVDM, i have pvdm4-32 and pvdm4-64 in my ISR 4331, how to calculate the number of encrypted calls?

I just was assigned the task of administrating three Unity Connection servers that are networked. The Operator mailboxes on each system have been taking messages since 2010 and have over 5 thousand messages in them (nearly 3 mega bytes). I've correct...

z9jnhami1 by Beginner
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I have a Cisco IP 7942 on SIP firmware 8.5.3SR1S.It has been successfully registered on a external VOIP server.Not our server, of a service provider. They say they have tested the phone and it just doesn't work on their system.   Incoming calls work,...

Hi, The call forwarding for SIP phones is not working, if we forward the calls from one of the extensions to external number and we call the Direct Number (MSN) we get “The call cannot be completed” and from the debug we get this cause “Unallocated/u...


We recently got the cisco 6851 ip phone installed at our work place.We cannot access the voicemail system because it requires a pin code?Our local phone installer gave us a "temporary" code but it didn't work the second we put it in.Anyone have any i...