Jeremy Parr
Systems Engineer
Ok, I know, been posted millions of times before, the one way audio issue that is always due to network issues. In this case I have my doubts - but would love to be proved wrong.
Two sites, and an IP Office at each site running 11.1.1.1.0.18. At site A we have 9608 stations, and at site B we have 1408 digital stations. Connecting these sites is an IPSec tunnel across the internet, with full access between the VLANs on both sides. We can ping all day long with <1% packet loss, at about 15ms. A SIP trunk is set up to connect the two sites. With or without "Re-invite Supported" and "Allow Direct Media Path" we sometimes experience one way audio. It always exhibits itself as site A not being able to hear site B.
I've deployed a 9608 at site B, registered to the phone system at Site A, and this seems work 100%, haven't had any issues with audio path.
In another failure mode I've seen, calling from Site B to Site A, I'll dial the extension number, hear ringing in the phone I'm dialing from, the remote phone will ring, but despite being answered I'll continue hearing ringing in the phone I called from - with obviously silence at the remote end.
We have a single IPSec tunnel between the sites, no failover. All inspection etc has been turned off on the IPSec tunnel, so we shouldn't have anything being blocked. In another thread here I see reference to someone experiencing similar issues, and apparently identified it as a bad VCM card.
Any suggestions would be appreciated, very much banging by head against a wall on this one.
Two sites, and an IP Office at each site running 11.1.1.1.0.18. At site A we have 9608 stations, and at site B we have 1408 digital stations. Connecting these sites is an IPSec tunnel across the internet, with full access between the VLANs on both sides. We can ping all day long with <1% packet loss, at about 15ms. A SIP trunk is set up to connect the two sites. With or without "Re-invite Supported" and "Allow Direct Media Path" we sometimes experience one way audio. It always exhibits itself as site A not being able to hear site B.
I've deployed a 9608 at site B, registered to the phone system at Site A, and this seems work 100%, haven't had any issues with audio path.
In another failure mode I've seen, calling from Site B to Site A, I'll dial the extension number, hear ringing in the phone I'm dialing from, the remote phone will ring, but despite being answered I'll continue hearing ringing in the phone I called from - with obviously silence at the remote end.
We have a single IPSec tunnel between the sites, no failover. All inspection etc has been turned off on the IPSec tunnel, so we shouldn't have anything being blocked. In another thread here I see reference to someone experiencing similar issues, and apparently identified it as a bad VCM card.
Any suggestions would be appreciated, very much banging by head against a wall on this one.