Hi everyone,
I am doing some bespoke development work with Asterisk and I’m stuck on this issue.
When you make an outgoing call there is no audio until it is placed on-hold and off-hold.
For incoming calls, the audio seems to work fine (from another SIP Provider to a UK number with Zadarma).
I have tested using Groundwire on iPhone and X-Lite on PC with the same result. The call flow is a phone in LAN, to VULTR server in WAN, to Zadarma SIP Provider, to a UK number with another SIP Provider (Yay).
I set up an extension on the Asterisk server which just plays music and that audio always seems to work fine. It’s only when calling out over Zadarma that I see this issue so I don’t know where the issue is but I think it is further upstream.
I tried adding some settings for NAT (even though the server has its own IPv4 and isn’t using NAT). I also tried adding some settings to the endpoint such as directmedia=no in attempt to fix the issue.
I am using the default rtp.conf sample file.
Here is my pjsip.conf file with passwords removed and SIP user ID changed:
; --- --- --- Start of File "pjsip.conf"
; --- --- --- Start of Transports
; --- Start of Transport "transport-udp"
[transport-udp]
type=transport
protocol=udp
bind=45.76.185.48
; Configuring res_pjsip to work through nat: https://wiki.asterisk.org/wiki/display/AST/Configuring+res_pjsip+to+work+through+NAT
local_net=127.0.0.1/32
external_media_address=45.76.185.48
external_signaling_address=45.76.185.48
; --- End of Transport "transport-udp"
; --- --- --- End of Transports
; --- --- --- Start of Trunks
; --- Start of Trunk "zadarma"
[54321]
type=registration
transport=transport-udp
outbound_auth=54321
server_uri=sip:sip.zadarma.com
client_uri=sip:54321@sip.zadarma.com
retry_interval=60
expiration=120
contact_user=54321
[54321]
type=auth
auth_type=userpass
password=
username=54321
[54321]
type=aor
contact=sip:sip.zadarma.com:5060
[54321]
type=endpoint
transport=transport-udp
context=LocalSets
allow=!all,ulaw
outbound_auth=54321
aors=54321
from_user=54321
direct_media=no
rtp_symmetric=yes
force_rport=yes
rewrite_contact=yes
[54321]
type=identify
endpoint=54321
match=sip.zadarma.com
match=185.45.152.0/24
match=185.45.155.0/24
match=37.139.38.0/24
match=195.122.19.0/27
; --- End of Trunk "zadarma"
; --- --- --- End of Trunks
; --- --- --- Start of Templates
; --- Start of Template "endpoint"
[endpoint](!)
type=endpoint
transport=transport-udp
context=internal
allow=!all,ulaw
direct_media=no
rtp_symmetric=yes
force_rport=yes
rewrite_contact=yes
[auth-userpass](!)
type=auth
auth_type=userpass
[aor-single-reg](!)
type=aor
max_contacts=10
; --- End of Template "endpoint"
; --- --- --- End of Templates
; --- --- --- Start of Endpoints
; --- Start of Endpoint "1001"
[1001](endpoint)
auth=1001
aors=1001
[1001](auth-userpass)
password=
username=1001
[1001](aor-single-reg)
; --- End of Endpoint "1001"
; --- Start of Endpoint "1002"
[1002](endpoint)
auth=1002
aors=1002
[1002](auth-userpass)
password=
username=1002
[1002](aor-single-reg)
; --- End of Endpoint "1002"
; --- --- --- End of Endpoints
; --- --- --- End of File "pjsip.conf"