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Dear All,   I'm migrating from ISDN/MGCP to SIP and I've noticed with SIP when my ITSP sends calls where the caller id (ANI) is withheld the phone displays the empty string rather than "Unknown Number". This is disturbing for our end users.   My Call...

j.a.m.e.s by Level 4
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Hello all. A little help much appreciated getting up to speed with the Cisco SIP handsets and CME. I've upgraded the IOS on a C2911 from C2900-UNIVERSALK9-M, Version 15.5(3)M to Version 15.7(3)M2 in order to support 8861/8865 phones. ROM: System Boot...