G400E bridged call delay and bad audio quality

Hello,
I have one G400E card with 3 active SIM cars in it.

It is working with asterisk 1.8.14 and it is configured in the following manner.

An incoming call on one SIM is sent out onto another free SIM to one mobile phone.

Everything is working well but the audio quality is bad (very low audio).

Also we noticed a delay in voice, something like on voip, when the latency is high. It takes 2-3 seconds from the moment I say something until the remote party hears me.

Can I do something to improve this aspects?

Thank you.

Hello,

I suppose your GSM modem is M20（you can check it the model name in command 'gsm show span 1' on Asterisk console）.

To impove the low audio, you can modifie file m20.conf in /etc/openvox/opvxg4xx/modules/m20.conf, line 67.

//////////////////////////////////////////////
AT_CALL_INIT => AT
AT_CALL_PROCEEDING => AT+CLVL? // Replace it by "AT_CALL_PROCEEDING => AT+CLVL=80"
AT_MO_CONNECTED => MO CONNECTED
/////////////////////////////////////////////

Save and exit it. Then restart Asterisk.

Thank you.
I will give it a try.

Best regards.

Hello,
I made the changes you suggested, but now the call is not connected. It only rings and when I answer the call is hungup and the calling party hears a message from the operator that I am not available.

This is the output of a working call:
__________________________________________________________________________________________

-- Accepting overlap call from '074XXXXXXX' to 's' on channel 1, span 3
-- Starting simple switch on 'EXTRA/5-1'
-- Executing [s@sim3:1] MYSQL("EXTRA/5-1", "Connect connid localhost ********* *********** *******") in new stack
-- Executing [s@sim3:2] MYSQL("EXTRA/5-1", "Query resultid 1 SELECT is_fwd, fwd_number FROM voice WHERE `sim`='sim3'") in new stack
-- Executing [s@sim3:3] MYSQL("EXTRA/5-1", "Fetch fetchid 2 is_fwd fwd_number") in new stack
-- Executing [s@sim3:4] MYSQL("EXTRA/5-1", "Disconnect 1") in new stack
-- Executing [s@sim3:5] GotoIf("EXTRA/5-1", "0?hangup") in new stack
-- Executing [s@sim3:6] Dial("EXTRA/5-1", "extra/g11/072XXXXXXX") in new stack
-- Requested transfer capability: 0x00 - SPEECH
-- Called extra/g11/072XXXXXXX
-- EXTRA/1-1 is proceeding passing it to EXTRA/5-1
-- EXTRA/1-1 is making progress passing it to EXTRA/5-1
-- PROGRESS with cause code 0 received
-- EXTRA/1-1 is making progress passing it to EXTRA/5-1
-- EXTRA/1-1 is making progress passing it to EXTRA/5-1
-- EXTRA/1-1 answered EXTRA/5-1 <

---

This is the moment I am answering the call[/color]
-- Channel 1, span 3 got hangup, cause 16
-- Channel 1, span 3 received AOC-E charging 60145440 units
-- Hungup 'EXTRA/1-1'
== Spawn extension (sim3, s, 6) exited non-zero on 'EXTRA/5-1'
-- Hungup 'EXTRA/5-1'
-- Channel 1, span 1 received AOC-E charging -1402967648 units

_____________________________________________________________________________________________

And this is the output of a non working call, after I did the changes.
______________________________________________________________________________________________

-- Accepting overlap call from '074XXXXXXX' to 's' on channel 1, span 3
-- Starting simple switch on 'EXTRA/5-1'
-- Executing [s@sim3:1] MYSQL("EXTRA/5-1", "Connect connid localhost ******** *********** *******") in new stack
-- Executing [s@sim3:2] MYSQL("EXTRA/5-1", "Query resultid 1 SELECT is_fwd, fwd_number FROM voice WHERE `sim`='sim3'") in new stack
-- Executing [s@sim3:3] MYSQL("EXTRA/5-1", "Fetch fetchid 2 is_fwd fwd_number") in new stack
-- Executing [s@sim3:4] MYSQL("EXTRA/5-1", "Disconnect 1") in new stack
-- Executing [s@sim3:5] GotoIf("EXTRA/5-1", "0?hangup") in new stack
-- Executing [s@sim3:6] Dial("EXTRA/5-1", "extra/g11/072XXXXXXX") in new stack
-- Requested transfer capability: 0x00 - SPEECH
-- Called extra/g11/072XXXXXXX
-- EXTRA/1-1 is proceeding passing it to EXTRA/5-1
-- EXTRA/1-1 is making progress passing it to EXTRA/5-1
-- Channel 1, span 3 got hangup, cause 19 <

---

This is the moment I am answering the call[/color]
-- Channel 1, span 3 received AOC-E charging 0 units
-- Hungup 'EXTRA/1-1'
== Spawn extension (sim3, s, 6) exited non-zero on 'EXTRA/5-1'
-- Hungup 'EXTRA/5-1'
-- Channel 1, span 1 received AOC-E charging 263108592 units

________________________________________________________________________________________________

Thank you.

Best regards.

Hello,

Please switch the 80 to be a lower value, like 60 or 40 etc.

Remember to reload Asterisk once you take this done.

Hello,
It is the same no matter what number I put in there. I tried from 60 till 10, but the call is not connected.

Thank you.

Best regards.