Yealink SIP-T22P VOIP phones unreachable from Asterisk PBX
Environment
- Trixbox 2.6 PBX (Asterisk 1.4)
- Mixture of Linksys SPA 942 and Yealink SIP-T22P VOIP phones
- Phones connecting to the PBX from a remote site over WAN.
Issue
People using Yealink SIP-T22P SIP phones occasionally can't receive incoming calls. Outgoing calls working fine. Linksys phones are not affected. When the issue occurs Asterisk CLI shows phones as UNREACHABLE. Yealink web GUI displays phones as Registered. Rebooting phone resolves the issue until it happens next time.
Worst thing is that users don't have any indication when their phones are not able to receive incoming calls.
Read more: Yealink SIP-T22P VOIP phones unreachable from Asterisk PBX
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Read more: Add Netgear ReadyNAS share as VMware ESXi datastore
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To forward extension on Trixbox Asterisk server:
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- Under Device Options change value of field dial
- To forward to an extension on the same VOIP server:
SIP/601
Where: 601 - extension you are forwarding to - To forward to an extension to another outgoing trunk:
IAX2/Boston/601
Where: IAX2/Boston - trunk name; 601 - extension you are forwarding to
Trixbox v2.6.2.2
Read more: Trixbox Asterisk - Forward extension via web admin GUI
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