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651 posts

Ultimate Geek
+1 received by user: 163

Topic # 231967 23-Mar-2018 10:32
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I have two line, both with extension dialing enabled 100 & 101.


if ext. 100 calls 101, the call goes through, no problem.


But, if Ext. 101 calls 100, the call goes straight to 2talk voicemail answer service, does not even ring.


Any Ideas?




Turned off 'Locate me', 'Call Forwarding' and 'Do Not Disturb '



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6369 posts

Uber Geek
+1 received by user: 319


  Reply # 1981895 23-Mar-2018 10:41
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Are you using TCP or UDP for SIP, I find similar issies if using UDP, but could be a number of other things



3687 posts

Uber Geek
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  Reply # 1981976 23-Mar-2018 11:38
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Yep do some packet captures and see what signalling is going on. What endpoints are you using? ...only reason for asking is ones like Yealink have built capture facilities.


176 posts

Master Geek
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  Reply # 1982011 23-Mar-2018 12:07
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All my bets would be on this being a firewall NAT SIP ALG issue.


I'd first try changing the registration and outbound signalling port to 50060 (2talk also listen on this port), to avoid any ALGs on 5060. If that didn't work then I'd look at reducing the keepalive interval on the clients down to below 30 seconds.



5290 posts

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  Reply # 1982051 23-Mar-2018 13:22
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Are they two separate SIP lines?
What happens if you dial the full phone number?

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