SIPstation - No audio or sound on external calls
Implementing FreePBX was pretty straight forward. The one snag we hit was with getting SIP Trunks working. We opted to for SIPstation since it was built in and it turned out to be really easy as it configures the trunks for you and creates the outbound & inbound routes too. It does require a few pretty straight forward tweaks BUT there were a few head-scratchers issues to contend with...
ISSUE #1: No audio on any calls to the outside. We tried every possible setting and read every blog. We contacted Sangoma Support and they said that the server was sending both its internal and external IP in the same string. They said to check our SIP NAT Settings as only one IP should be in the sip registration string.
We checked and they all seemed perfect. Here's a pic:
The SIPstation page was still showing yellow boxes which is an alert to this issue.
We thought to click the STATIC IP button and manually enter the PUBLIC IP as follows:
VOILA it fixed the issue and confirmed by the SIPstation page that no longer showed yellow boxes.
We then started having issues with calls to/from cellphones were still having the issue of no audio. In searching through some blogs we found that SIPstation supports the g729 codec and added it to the sip trunk registration string. Before: "allow=ulaw" After: "allow=ulaw&g729"
NOTE: THE NO CODECS is misleading. SIPstation supports g729 (cellphone) codec and it works.
We then ran into the codec issue with Voicemail on FreePBX. We noticed the g729 codec mentioned in the logs and we thought to remove the codec from the phone which fixed the issue. We did some research and found that we needed to install the G729 Codec & License on the FreePBX server to fix the g729 codec issue with voicemail audio on our Polycom phones and cellphones by following these instructions: http://downloads.digium.com/pub/telephony/codec_g729/README
ISSUE #1: No audio on any calls to the outside. We tried every possible setting and read every blog. We contacted Sangoma Support and they said that the server was sending both its internal and external IP in the same string. They said to check our SIP NAT Settings as only one IP should be in the sip registration string.
We checked and they all seemed perfect. Here's a pic:
Note the 2nd line in the description of the setting: "If the public address is not correctly detected..."
The SIPstation page was still showing yellow boxes which is an alert to this issue.
We thought to click the STATIC IP button and manually enter the PUBLIC IP as follows:
We then started having issues with calls to/from cellphones were still having the issue of no audio. In searching through some blogs we found that SIPstation supports the g729 codec and added it to the sip trunk registration string. Before: "allow=ulaw" After: "allow=ulaw&g729"
NOTE: THE NO CODECS is misleading. SIPstation supports g729 (cellphone) codec and it works.
We then ran into the codec issue with Voicemail on FreePBX. We noticed the g729 codec mentioned in the logs and we thought to remove the codec from the phone which fixed the issue. We did some research and found that we needed to install the G729 Codec & License on the FreePBX server to fix the g729 codec issue with voicemail audio on our Polycom phones and cellphones by following these instructions: http://downloads.digium.com/pub/telephony/codec_g729/README
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