RC7611 setup correctly, but error on dial

IoT Modules RC76
1

Before I installed my phone company APN, I dialed out and got a CONNECT using the semicolon after the number. But there were no signals on the PCM interface, so I checked the network setup. There was an APN “ims” and “sos” for example. When I installed my APN it disconnected and reconnected automatically and no errors. I tried rebooting also. It all seems correct but now it will not connect when I try to dial out.

AT+CGDCONT?
+CGDCONT: 1,“IPV4V6”,“reseller.mncxxx.mccxxx.gprs”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0
+CGDCONT: 2,“IPV4V6”,"",“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0
+CGDCONT: 3,“IPV4V6”,"",“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

AT+CGPADDR=1
+CGPADDR: 1,10.12.35.xxx,38.0.3.128.32.219.xxx.45.0.0.0.0.231.22.xxx.1

AT+CGACT?
+CGACT: 1,1
+CGACT: 2,0
+CGACT: 3,0

atd18004444444
NO CARRIER
atd18004444444;
ERROR

2

I don’t see problem with WCDMA network:

at!gstatus?
!GSTATUS:
Current Time: 64 Temperature: 27
Modem Mitigate Level: 0 ModemProc Mitigate Level: 0
Reset Counter: 1 Mode: ONLINE
System mode: WCDMA PS state: Attached
IMS reg state: UNKNOWN IMS mode: Not Support
IMS Srv State: UNKNOWN SMS,UNKNOWN VoIP
WCDMA band: WCDMA 2100
WCDMA channel: 10638
GMM (PS) state:REGISTERED NORMAL SERVICE
MM (CS) state: IDLE NORMAL SERVICE

WCDMA L1 state:L1M_DCH LAC: 2F1D (12061)
RRC state: CELL_DCH UTRAN Cell ID: 0019ADDF (1682911)
RxM RSSI C0: -70 RxD RSSI C0: -94
RxM RSSI C1: — RxD RSSI C1: —

OK
atd1234567;
OK
ath
OK
ati3
Manufacturer: Sierra Wireless, Incorporated
Model: RC7620
Revision: SWI9X07H_00.03.03.00 2bb7a4 jenkins 2020/04/15 07:57:29
IMEI: 353634110000980
IMEI SV: 14
FSN: 7Q9472000710AA
+GCAP: +CGSM,+DS,+ES

OK

Not sure if you need to register IMS network for VoLTE, you need to ask your operator.

3

How do I register IMS? GSTATUS shows I have no VoIP.

ATI3

Manufacturer: Sierra Wireless, Incorporated
Model: RC7611-1
Revision: SWI9X07H_00.03.03.00 2bb7a4 jenkins 2020/04/15 07:57:29
IMEI: 3521391104xxxxx
IMEI SV: 14
FSN: 6N02778549xxxx
+GCAP: +CGSM

OK
!GSTATUS?

!GSTATUS:
Current Time: 562 Temperature: 30
Modem Mitigate Level: 0 ModemProc Mitigate Level: 0
Reset Counter: 2 Mode: ONLINE
System mode: LTE PS state: Attached
IMS reg state: NOT REGISTERED IMS mode: Normal
IMS Srv State: NO SMS,NO VoIP
LTE band: B2 LTE bw: 15 MHz
LTE Rx chan: 825 LTE Tx chan: 18825
LTE CA state: INACTIVE
EMM state: Registered Normal Service
RRC state: RRC Idle

PCC RxM RSSI: -73 RSRP (dBm): -108
PCC RxD RSSI: -81 RSRP (dBm): -116
Tx Power: – TAC: 9006 (36870)
RSRQ (dB): -16 Cell ID: 052E3E0D (86916621)
SINR (dB): 12.2
OK

4

Is it working on WCDMA network?
What is the APN for VoLTE ? You need to ask your operator.

5

I put it back. Thankfully I remembered what was there.

AT+CGDCONT=2,“IPV4V6”,“ims”
OK
AT+CGACT=2,1
OK
AT+CFUN=1,1 (reboot)

!GSTATUS
. . .
IMS Srv State: FULL SMS,FULL VoIP
. . .

Now it connects when I dial out. Still no signal on the PCM. I don’t know what the audio profiles have to do with it. The 0, 8, and 9 are configured. There are no others that list under !AVCFG. I will worry about the signal format later. I just want to see outputs on the clock and data lines.

6

you might try the same AT command as here:

7

The AT!AVPIFACEPREF was set to F already. I set it to D but still no output.

I did an AT!AVSETPROFILE=0 to set to the first valid profile I have.
!AVSETPROFILE: 0,0,0,0,3,0

Still no output But the AT guide says !AVSETPROFILE “Select/configure audio profile for CS call”
The RC7611 is VoLTE only. No “circuit switched” calling. So I am not sure about this command use.

8

can you set to use profile 5?

9

No change. After ATD connects DC voltages only on PCM out, sync, clock.

10

did you use PCM master mode?

11

In the recent firmware update, the selection of audio setting options is reduced. There is only master mode.

12

you might need to test in Release 7 which is future release.
Seems it is fixed there.

13

More precisely, what is fixed?

14

PCM audio signal…

15

Does anybody know when it will be out?

16

All the PCM data lines are high impedance inputs. I noticed when I dialed out and connected there was burst noise on them. Not digital. Then I tested by using a resistor to pull them up or down. They are all set up as inputs. I am surprised because this module has been out a year and the PCM audio in the datasheet has not been implemented yet. I have not seen any notification about this.