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I've recently added Lync and a SIP switch to my home lab because it sounded like it would be fun (a PBX is next on the list). So far it has been. I'm having one small little issue I'm trying to shake out though and none of my personal troubleshooting or google searches have come up with anything.
The setup seems to be working great for the most part, I can mostly send and receive calls on PCs, forward calls, and use simultanious ringing to my hard line. Mostly. There's one thorn in my side right now, dialing OUT to AT&T mobile numbers. I can receive calls from AT&T mobile numbers and get two way audio but if I dial one from my PC, I can hear the audio from the cell phone to my setup but not the audio from my setup to the cell phone. The calls that don't work don't seem to have any issue other than the one way audio, I've left them connected for 15+ minutes so it doesn't seem to disconnect due to some other problem...
I've tested with Verizon cell phones, comcast residential phone service and both of those carriers work 100% both inbound and outbound calls with full two way audio. I've also called the support numbers for all of the major carriers including AT&T and was able to navigate their menus with DTMF tones from the lync dial pad (which I can't hear if dialed during a AT&T cell phone call).
So, again, only for calls from my system to AT&T mobile numbers has one way audio and always from my system to the cell phone, all other calls complete perfectly including inbound AT&T mobile calls.
I've done debug logging on the SIP trunks and the setup and tear down of outbound calls that work and don't work seem to be practically identical. The only real difference I saw was on the tear down but it just seems like cell phones and landlines hang up differently. I also checked the inbound calls from AT&T vs comcast voice and again, practically identical.
The setup is behind a NAT but I'm watching the firewall logs and it's not dropping any pertinent packets.
My setup is:
The setup seems to be working great for the most part, I can mostly send and receive calls on PCs, forward calls, and use simultanious ringing to my hard line. Mostly. There's one thorn in my side right now, dialing OUT to AT&T mobile numbers. I can receive calls from AT&T mobile numbers and get two way audio but if I dial one from my PC, I can hear the audio from the cell phone to my setup but not the audio from my setup to the cell phone. The calls that don't work don't seem to have any issue other than the one way audio, I've left them connected for 15+ minutes so it doesn't seem to disconnect due to some other problem...
I've tested with Verizon cell phones, comcast residential phone service and both of those carriers work 100% both inbound and outbound calls with full two way audio. I've also called the support numbers for all of the major carriers including AT&T and was able to navigate their menus with DTMF tones from the lync dial pad (which I can't hear if dialed during a AT&T cell phone call).
So, again, only for calls from my system to AT&T mobile numbers has one way audio and always from my system to the cell phone, all other calls complete perfectly including inbound AT&T mobile calls.
I've done debug logging on the SIP trunks and the setup and tear down of outbound calls that work and don't work seem to be practically identical. The only real difference I saw was on the tear down but it just seems like cell phones and landlines hang up differently. I also checked the inbound calls from AT&T vs comcast voice and again, practically identical.
The setup is behind a NAT but I'm watching the firewall logs and it's not dropping any pertinent packets.
My setup is:
- Lync 2010 Enterprise in about 20 VMs (ok not really 20 but if you've ever setup enterprise lync/ocs you know what I mean)
- FreeSwitch in a seperate VM
- 3 DIDs and 2 trunks from sipstation
- Lync 2010/2013 client
- TMG firewall