IP Telephony and Phones

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Hello, We are planning to migrate to CUBE solution ( 4431) from our current PRI, Our goal is to configure  both cube routers (4431) in active /active  configuration with balancing and  redundancy. I could not find a document  that explains the cube i...

csunni by Level 1
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Dear All, I had an issue with external calling over SIP trunk for 10mins, and the issue got auto resolved before I reach ITSP. I have collected SIP logs on voice gateway, as per the logs I had not received any message from ITSP when the VG sent INVIT...

Syed by Level 3
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  • 7 replies
  • 0 Helpful votes

Hello All, I have 3 dial-peers all set with the preference command.  Even though dial-peer voice 8 is the highest number (Preference 9) it's always selected over the other two.  My goal of dial-peer 8 was to be used only during SRST mode, which it do...

I'm attempting to setup SRST on a 4321, but am having some issues regarding multiple inbound calls. Outbound calls and the initial inbound call work without issue, but when I attempt to make a second call inbound the call arrives at the gateway, but ...

Hi, I have a little confusion about T1/E1 and ISDN PRI. Document says T1/E1 is a leased line, and ISDN PRI is circuit switching. ISDN PRI——(23B [64 kb/s] +D [64 kb/s] +synchronization [8 kb/s])- 1.544Mb/sISDN PRI——(30B [64 kb/s] +D [64 kb/s] +sync...