I have a cisco VPN from router to router over a Data T-1. The ping times are consistently 32ms with random ping responses of 295ms -408ms about every 30 secs to a minute, I have jitter buffer enabled. The connection goes like this… Mitel SIP phone to Asterisk A, IAX trunked to Asterisk B and then T-1 to a PBX, the calls are internal so they are terminating on Toshiba digital phones. Loud crackling even happens from time to time when a Mitel SIP phone is connected to Asterisk B at that location over thye LAN with no layer three routing, but it is consistent on the IAX trunk. There is a lot of Data traffic, but thus should work regardless, I don’t think the ping times are the issue.

 

Jordan Novak

Communications Technician

 

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