Allworx Technical Support Forum

adguajar wrote: ↑Tue Jun 07, 2022 3:24 pm Hello,

weird issue, need your help

2 networks (all open to each other)
10.x.x.x (network1) and 192.x.x.x (Network2)

2 PBXs (1 on each network)
2 adtrans (sip trunk, 1 on each network)

CallFlow
PSTN > Phone
Answer all good
Phone click HOLD (MOH)
MOH all good
Phone click RESUME
1 phone1 is good
1 phone2 we get 1 way audio

Afer reviewing Traces following are the difference
Following are the last Invites and OKs from the good/bad.


GOOD

Invite >>> Phone1 (10.x.x.x) ip > PBX2 (192.x.x.x) ip
SDP to use port 22352 with Phone1 ip

OK >> (with SDP) PBX2 (192.x.x.x) > Phone1 (10.x.x.x)
SDP to use 15094 with PBX1 (10.x.x.x)

you will see the RTP flowing
betwwen
PBX1 (10.x.x.x) <> Phone1 (10.x.x.x) (with the correct ports)


BAD
Invite >> Phone2 (10.x.x.x) > PBX1 (10.x.x.x)
SDP to use 16660 with Phone2 (10.x.x.x)

Frame 1041
OK >> SDP PBX1 (10.x.x.x) > Phone2 (10.x.x.x)
SDP to use 10136 with Adtran2 (192.x.x.x)

1 way audio. (PSTN doesnt hear Phone2)

So basically the difference is the OK with SDP coming from PBX
Good = will use a PBX
Bad = will use an Adtran.

Why one PBX will send OK with SDP to use the PBX and the other the adtran??

adguajar wrote: ↑Fri Jun 10, 2022 7:45 am Voice path between Adtran and PBX/Phone is good.

the question is why the PBX is sending the IP of the Adtran on the SDP and not the other PBX like a good example.