IP Telephony and Phones

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Hi, scenario: a calling machine or a PBX named AlertingServer is connected to a Cisco Communications Manager 10.x via Standard SIP Trunk. Now this server is calling phones via the SIP-Trunk with an alerting message. But unfortunately these phones are...

Dear All, I have got a couple of 7911 phones running on SCCP11.9-4-2SR1-1S firmware which are not registering, and show rejected status. I deleted the phones and added back but no luck. What could be the reason? For your information, only 5 out of 35...

Syed by Level 3
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  • 13 replies
  • 0 Helpful votes

Hi Everyone I'm trying to enable  sip option ping  but it still seems unknown. I  have created new sip security profile as selected "enable ping option" checkbox and associate to related sip trunk it, reset/restart trunk sip security profile. There ...

KY_ by Level 4
  • 1064 Views
  • 2 replies
  • 0 Helpful votes

Hello, I want to test our internal network for voice readiness (Delay, jitter, latency, bandwidth) are there any tools commercial or free which i can use to set up a server in network and test the client from various locations in our network for VoIP...