IP Telephony and Phones

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Hi EveryoneHope you guys are doing well I need a help, I'm using cucm 14 and I want to add a prefix on missed call.for example if I need to call any landing I must use prefix as 9 because its configure but when i get a missed call and want to call ba...

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 Level 1
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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,...