Outgoing Voice does not reach another party

Asterisk Asterisk Support
1

Hi,

I make call through TDM Card. 2 FXO and 2 FXS.

When I make call from IP Phone to outside, my voice does not reach another party, but I can hear him. However, when I make call from FXS to outside, everything is fine. All outside call goes through FXO port.

zaptel.conf
loadzone=pl
defaultzone=pl
fxsks=1-2
fxoks=3-4

zapata.conf
[channels]
busydetect=yes
busycount=4
callprogress=yes
hanguponpolarityswitch=yes
signalling=fxs_ks
language=en
context=incoming
group=1
callwaiting=yes
threewaycalling=yes
transfer=yes
channel=>1-2

signalling=fxo_ks
language=en
context=home
immediate=no
callwaiting=yes
threewaycalling=yes
transfer=yes
;callgroup=1
channel=>3-4

zaptel version: 1.4.12.1
Asterisk version: 1.4.22

What does may cause?

Thanks in advance!

2

Sounds like a rtp 10,000-20,000 port problem. Do you have a firewall or nat between your SIP phone and your Asterisk box? It looks like 5060 is doing the SIP invite and rtp 10,000-20,000 is OK inbound to your SIP phone but not outbound.

3

Thanks for reply.

sip phone and asterisk are located in the same subnet, and they are connected to one switch. There is no any firewall at all.

I can receive call, but when I make call from ip phone to outside over FXO, another party can’t hear my voice, but I can hear his voice.

4

Forse the codec to alaw (disallow=all , allow=alaw) and canreinvite=no for that IP phone.
Can you test with some softphone?

5

It doesn’t help. :frowning: