MC8795V Voice Call problem

IoT Modules MC/EM Series
1

Hello,

I am trying to make a phone call with a MC8795V to no avail. The modem is in direct ip mode. When I issue a “atd” command I receive okey but nothing happens. I made a list of the commands below. I would be most happy if you can guide me in troubleshooting this problem

at+cpin?
at+cpin?

+CPIN: READY
OK

at+creg?
at+creg?
+CREG: 0,1
OK

at+cops?
at+cops?

+COPS: 0,0,“TURKCELL”,2
OK

atd054335162; (Note that I omitted the last 2 digits)
atd054335162;

OK
OK

I also tried calling from an other phone to the modem, I can see the “ringing” message but when I issue an ATA command to answer it, the connection automatically hangs up

at!swicallprog =1
at!swicallprog =1
ok

RING

!SWICALLPROG: 1,1,4,0,0,“054335162”,128

RING

ata;
ata;

OK

At this point, the connection automatically hangs up. Can you please guide me about this problem?
Thanks a lot for your time
rifo

2

Hi,

That’s strange. I tested with FW K2_0_7_30AP successfully. What FW are you using?

3

Hello,

Thanks a lot for your response. I have checked my firmware number. It’s K2_0_7_46CAP Do you think that I need an update?

at+gmr
at+gmr

K2_0_7_46CAP C:/WS/FW/K2_0_7_46CAP/MSM6290/SRC 2010/12/13 22:29:01

One more thing is, I don’t think this is the case but is it possible that I need a hardware specific arrangement so that voice calls are active.

Thanks a lot

Rifat Türsen

4

hardware specific means??

i just used MC standalone and checked… lemme check for any FW updates for you… or else, you can get the FW thru your distributor also…

5

Hello Alex,

By hardware specific, I was referring to any kind of external circuitry necessary for voice services. The thing is, I am only using MC8795 for data communication hence I don’t have any external circuitry regarding the voice communication. But recently a customer (for some reason) required that a SAR test (for voice services) should be done.
Anyway, since you used MC standalone, I guess that shouldn’t be a problem.

I would be most happy if you can check any FW updates because I am almost sure that it will take quite a long time if I go through my distributor.

Thanks a lot for your help:)

6

standalone means i did not use any external circuitary… well, is the issue happening with other service providers also or is it specific to one service provider… can u check the FW over here :

http://developer.sierrawireless.com/Resources.aspx#&&filter=Devices-eq-(4FF0DC94-950B-4D01-8E69-11A3616D3A74)

The software downloads section…

nd SAR test… umm… i dont have much idea about that… i have just issued the command what u did… but yes, for you it seems to be issue while receiving the call also… lets c if above FW works…

Please share the results!

7

nd yes… how would you communicate by voice… external circuitary is definitely neede… but first of all… let’s solve your issue with automatic hang up…

8

Can it not play recorded audio samples? Or do DTMF detection :question: