# RC76 **URL:** https://forum.sierrawireless.com/c/modules/rc76/130.md?page=2 [Latest](https://forum.sierrawireless.com/latest.md) · [Categories](https://forum.sierrawireless.com/categories.md) · [Tags](https://forum.sierrawireless.com/tags.md) **Page:** 3 --- ## [RC6720 low power modes](https://forum.sierrawireless.com/t/rc6720-low-power-modes/30964)
**Author:** [@james.hillman](https://forum.sierrawireless.com/u/james.hillman)\ **Replies:** 23\ **Last updated:** [November 20, 2023, 12:10pm UTC](https://forum.sierrawireless.com/t/rc6720-low-power-modes/30964 "2023-11-20T12:10:49Z")
I am new to the RC7620. I am moving from a module that is able to maintain a TCP/IP connection whilst sleeping when no data to send. The current module goes to sleep ~1 second after the last packet is sent and wakes up v… --- ## [QMI indications](https://forum.sierrawireless.com/t/qmi-indications/30977)
**Author:** [@saim](https://forum.sierrawireless.com/u/saim)\ **Replies:** 3\ **Last updated:** [November 15, 2023, 9:13am UTC](https://forum.sierrawireless.com/t/qmi-indications/30977 "2023-11-15T09:13:46Z")
Is there a documentation somewhere about what set of indications are supported by the QC chip in RC7620? Some indications are working and some are not. Would be nice to have the list somewhere to check, Regards, Sai. --- ## [RC76xx firmware variants](https://forum.sierrawireless.com/t/rc76xx-firmware-variants/31008)
**Author:** [@simon1](https://forum.sierrawireless.com/u/simon1)\ **Replies:** 1\ **Last updated:** [November 9, 2023, 1:17am UTC](https://forum.sierrawireless.com/t/rc76xx-firmware-variants/31008 "2023-11-09T01:17:53Z")
What is the difference between the following firmware variants? R9.0 (Generic - PTCRB): RC7611, RC7611-1 R9.0 (US Cellular): RC7611, RC7611-1 R9.0 (Sierra): RC7611, RC7611-1 --- ## [DL MIMO in RC76xx](https://forum.sierrawireless.com/t/dl-mimo-in-rc76xx/30923)
**Author:** [@saim](https://forum.sierrawireless.com/u/saim)\ **Replies:** 5\ **Last updated:** [October 26, 2023, 1:25pm UTC](https://forum.sierrawireless.com/t/dl-mimo-in-rc76xx/30923 "2023-10-26T13:25:55Z")
Hi, is it possible to turn OFF DL MIMO in RC76xx? I found this AT command in the manual and I am trying to understand it better. AT$LGTRBANDST I have tried to set mode to SISO, but after power cycle it seems to have be… --- ## [Recovery from tcp\_notif \>= 0?](https://forum.sierrawireless.com/t/recovery-from-tcp-notif-0/30804)
**Author:** [@simon1](https://forum.sierrawireless.com/u/simon1)\ **Replies:** 2\ **Last updated:** [October 9, 2023, 1:21am UTC](https://forum.sierrawireless.com/t/recovery-from-tcp-notif-0/30804 "2023-10-09T01:21:44Z")
What is the expected recovery path when opening a TCP socket and receiving a tcp\_notif status code \>= 0? When opening a TCP socket with a RC7620, we frequently get the following situation: Socket is configured (AT+KTC… --- ## [RC7620-1 ATH does not deactivate PDP context](https://forum.sierrawireless.com/t/rc7620-1-ath-does-not-deactivate-pdp-context/30769)
**Author:** [@tvgeffen](https://forum.sierrawireless.com/u/tvgeffen)\ **Replies:** 2\ **Last updated:** [October 3, 2023, 11:08am UTC](https://forum.sierrawireless.com/t/rc7620-1-ath-does-not-deactivate-pdp-context/30769 "2023-10-03T11:08:40Z")
ati9 Manufacturer: Sierra Wireless, Incorporated Model: RC7620-1 QTI baseline: MPSS.JO.2.0.2.c1.1-00073-9607\_GENNS\_PACK-1.463040.2.469835.3 Revision: SWI9X07H\_00.08.44.07 2539f0 jenkins 2023/04/26 10:17:51 IMEI: 35… --- ## [RC7620-1 not available after update with "qmi-update-firmware"](https://forum.sierrawireless.com/t/rc7620-1-not-available-after-update-with-qmi-update-firmware/30723)
**Author:** [@JFTWIT](https://forum.sierrawireless.com/u/JFTWIT)\ **Replies:** 6\ **Last updated:** [September 27, 2023, 3:53pm UTC](https://forum.sierrawireless.com/t/rc7620-1-not-available-after-update-with-qmi-update-firmware/30723 "2023-09-27T15:53:12Z")
Hello, after updating an RC7620-1 with the latest firmware, the modem loops on the USB connect/disconnect part. I think it keeps rebooting. What is the method for recovering the modem? Thank you for your help. usb 1-… --- ## [RC76xx part number changes](https://forum.sierrawireless.com/t/rc76xx-part-number-changes/30615)
**Author:** [@lilly.doye](https://forum.sierrawireless.com/u/lilly.doye)\ **Replies:** 1\ **Last updated:** [September 15, 2023, 9:34am UTC](https://forum.sierrawireless.com/t/rc76xx-part-number-changes/30615 "2023-09-15T09:34:24Z")
I have a product design based around the RC7620 and RC7611 modules. I’ve specified the RC7620\_1104625 and RC7611\_1104595 as the full part numbers to use as these were the available modules when we started the design proc… --- ## [RC7620 echo cancellation not working correctly](https://forum.sierrawireless.com/t/rc7620-echo-cancellation-not-working-correctly/30439)
**Author:** [@gplaza](https://forum.sierrawireless.com/u/gplaza)\ **Replies:** 5\ **Last updated:** [August 28, 2023, 9:24am UTC](https://forum.sierrawireless.com/t/rc7620-echo-cancellation-not-working-correctly/30439 "2023-08-28T09:24:45Z")
Hello, We are using the RC7620 module to make calls. The echo cancellation is working properly because when we deactivate it we see that a very noticeable echo appears. Our problem is that even with the echo canceller … --- ## [RC7620 unresponsive to QMI (sometimes)](https://forum.sierrawireless.com/t/rc7620-unresponsive-to-qmi-sometimes/30508)
**Author:** [@saim](https://forum.sierrawireless.com/u/saim)\ **Replies:** 2\ **Last updated:** [August 24, 2023, 9:21am UTC](https://forum.sierrawireless.com/t/rc7620-unresponsive-to-qmi-sometimes/30508 "2023-08-24T09:21:50Z")
Hi, I am using libqmi APIs to configure/communicate to our RC7620 modem mounted on RED mangOH from Sierra wireless. It is found that sometimes, the modem becomes totally unresponsive. The only way out seems to be to res… --- ## [Rc7620 not registering on network](https://forum.sierrawireless.com/t/rc7620-not-registering-on-network/30485)
**Author:** [@ron.jacoby](https://forum.sierrawireless.com/u/ron.jacoby)\ **Replies:** 11\ **Last updated:** [August 21, 2023, 1:47pm UTC](https://forum.sierrawireless.com/t/rc7620-not-registering-on-network/30485 "2023-08-21T13:47:59Z")
hi rc7620 module refuses to register on telstra and optus australian network. the response it get from it follows, what does limited-regional means? ubuntu@ubuntu:~$ sudo qmicli -p -d /dev/cdc-wdm0 --nas-get-system-i… --- ## [RC7620-1 problem registering to the network](https://forum.sierrawireless.com/t/rc7620-1-problem-registering-to-the-network/28095)
**Author:** [@jan.krchnak](https://forum.sierrawireless.com/u/jan.krchnak)\ **Replies:** 8\ **Last updated:** [August 21, 2023, 2:42am UTC](https://forum.sierrawireless.com/t/rc7620-1-problem-registering-to-the-network/28095 "2023-08-21T02:42:11Z")
We are having issues with RC7620-1 modem connection to the network in specific places like Australia while no issue in other places. The modem starts OK and we get the CREG: 0 and CREG: 2 but nothing else after that. It… --- ## [RC7611 becomes unresponsive](https://forum.sierrawireless.com/t/rc7611-becomes-unresponsive/30306)
**Author:** [@pratos](https://forum.sierrawireless.com/u/pratos)\ **Replies:** 1\ **Last updated:** [August 1, 2023, 9:22am UTC](https://forum.sierrawireless.com/t/rc7611-becomes-unresponsive/30306 "2023-08-01T09:22:44Z")
Hello, We are facing a major communication issue with RC7611. We use a code block that continuously issues command AT+CPMS? to the modem to check for incoming SMS messages which has been working without any problems wi… --- ## [RC7620 2G voice calls do not return CONNECT but](https://forum.sierrawireless.com/t/rc7620-2g-voice-calls-do-not-return-connect-but/28809)
**Author:** [@GaryATodd](https://forum.sierrawireless.com/u/GaryATodd)\ **Replies:** 5\ **Last updated:** [July 26, 2023, 10:39am UTC](https://forum.sierrawireless.com/t/rc7620-2g-voice-calls-do-not-return-connect-but/28809 "2023-07-26T10:39:49Z")
I have noticed that the RC7620-1 (R8 and R9 Firmware) does not return CONNECT when dialling outgoing voice calls but there seems to be a workaround: RC7620 with EE SIM forced to 2G network, diallng out to my O2 phone on… --- ## [At+cfun values](https://forum.sierrawireless.com/t/at-cfun-values/30265)
**Author:** [@saim](https://forum.sierrawireless.com/u/saim)\ **Replies:** 3\ **Last updated:** [July 21, 2023, 3:04pm UTC](https://forum.sierrawireless.com/t/at-cfun-values/30265 "2023-07-21T15:04:44Z")
Hi, what does it mean when at+cfun returns a ‘7’ in RC7620? Unable to find description for this in the latest AT command manual. Thanks, Sai. --- ## [MQTT broker connection using RC7620-1](https://forum.sierrawireless.com/t/mqtt-broker-connection-using-rc7620-1/30144)
**Author:** [@nikolaus.ng](https://forum.sierrawireless.com/u/nikolaus.ng)\ **Replies:** 3\ **Last updated:** [July 20, 2023, 7:48am UTC](https://forum.sierrawireless.com/t/mqtt-broker-connection-using-rc7620-1/30144 "2023-07-20T07:48:55Z")
Hi, is there any possibilities to connect RC7620-1 to MQTT broker ? Or AWS Iot core ? Thanks. --- ## [Operator name](https://forum.sierrawireless.com/t/operator-name/30046)
**Author:** [@saim](https://forum.sierrawireless.com/u/saim)\ **Replies:** 1\ **Last updated:** [June 21, 2023, 2:51pm UTC](https://forum.sierrawireless.com/t/operator-name/30046 "2023-06-21T14:51:35Z")
Hi, I have an RC7620. I am trying to get operator name using both AT and QMI commands. I have noticed that for some SIMs, the at+cops? gives out the correct operator name, but libqmi doesn’t. I tried this API, which keep… --- ## [Seeking the memory type of RC76](https://forum.sierrawireless.com/t/seeking-the-memory-type-of-rc76/30042)
**Author:** [@keysling](https://forum.sierrawireless.com/u/keysling)\ **Replies:** 1\ **Last updated:** [June 21, 2023, 2:56am UTC](https://forum.sierrawireless.com/t/seeking-the-memory-type-of-rc76/30042 "2023-06-21T02:56:13Z")
Hi, I am about to build an IoT system using the RC7630 application in a car parts factory. This system will operate in high-temperature conditions, which is a concern for the memory type of this module. I have searched … --- ## [RC7620-1 not making VoLTE calls](https://forum.sierrawireless.com/t/rc7620-1-not-making-volte-calls/30030)
**Author:** [@GaryATodd](https://forum.sierrawireless.com/u/GaryATodd)\ **Replies:** 3\ **Last updated:** [June 20, 2023, 10:15am UTC](https://forum.sierrawireless.com/t/rc7620-1-not-making-volte-calls/30030 "2023-06-20T10:15:05Z")
I have an RC760-1 (R8 firmware) with an EE SIM. I have configured for LTE only (KSRAT=5). However, the module will no longer make VoLTE calls. Immediately after issue the ATD command, the module responds with ERROR. I… --- ## [RC7620 update doesn't finish and no modem is detected](https://forum.sierrawireless.com/t/rc7620-update-doesnt-finish-and-no-modem-is-detected/29872)
**Author:** [@hector.jimenez.m](https://forum.sierrawireless.com/u/hector.jimenez.m)\ **Replies:** 6\ **Last updated:** [June 2, 2023, 3:20pm UTC](https://forum.sierrawireless.com/t/rc7620-update-doesnt-finish-and-no-modem-is-detected/29872 "2023-06-02T15:20:05Z")
I have tried to update modem rc7620 from SWI9X07H\_00.03.03.00 version to SWI9X07H\_00.08.24.02 in a imx8 linux based system with qmi tool: qmi-firmware-update --update --cdc-wdm /dev/cdc-wdm0 RC76xx\_Release9\_GENERIC\_GCF… --- ## [RC7620 cannot connect to the network](https://forum.sierrawireless.com/t/rc7620-cannot-connect-to-the-network/29710)
**Author:** [@jerry1](https://forum.sierrawireless.com/u/jerry1)\ **Replies:** 9\ **Last updated:** [May 11, 2023, 1:26am UTC](https://forum.sierrawireless.com/t/rc7620-cannot-connect-to-the-network/29710 "2023-05-11T01:26:40Z")
Hi, I can get the IP address of the module by command (at+cgcontrdp?) I manually added the IP address and netmask to the OS. But can’t ping 8.8.8.8 Even with udhcpc it fails too. --- ## [SACT data connection deactivated](https://forum.sierrawireless.com/t/sact-data-connection-deactivated/29677)
**Author:** [@jerry1](https://forum.sierrawireless.com/u/jerry1)\ **Replies:** 4\ **Last updated:** [May 4, 2023, 10:06am UTC](https://forum.sierrawireless.com/t/sact-data-connection-deactivated/29677 "2023-05-04T10:06:07Z")
Hi I am using RC7620-1 module in Linux OS. Send AT command AT!SCACT=1,1 and ping 8.8.8.8 Ping 8.8.8.8 for a period of time, the ICMP packet will be smaller than the 8.8.8.8 packet about seq=119. Query AT!SCACT? → 1,0 … --- ## [RC7620-1 AT command AT+CGCONTRDP \< gw\_addr\> blank](https://forum.sierrawireless.com/t/rc7620-1-at-command-at-cgcontrdp-gw-addr-blank/29612)
**Author:** [@jerry1](https://forum.sierrawireless.com/u/jerry1)\ **Replies:** 3\ **Last updated:** [April 27, 2023, 1:31am UTC](https://forum.sierrawireless.com/t/rc7620-1-at-command-at-cgcontrdp-gw-addr-blank/29612 "2023-04-27T01:31:25Z")
Hi, I use RC7620-1, send AT command AT+CGCONTRDP, the gateway address is blank. Is this normal? Other APN, local address and DNS address are displayed. Could anyone help me with this problem? Thanks. --- ## [SIM signalling](https://forum.sierrawireless.com/t/sim-signalling/29588)
**Author:** [@saim](https://forum.sierrawireless.com/u/saim)\ **Replies:** 9\ **Last updated:** [April 24, 2023, 10:40am UTC](https://forum.sierrawireless.com/t/sim-signalling/29588 "2023-04-24T10:40:54Z")
Hi, Has anyone tried to enable SIM status indication with libqmi APIs? I have RC76xx modem and when I try to enable signalling related to data connection status, the modem sends signals properly, but when I enable signa… --- ## [RC7611-1 rebooting during LTE TX test](https://forum.sierrawireless.com/t/rc7611-1-rebooting-during-lte-tx-test/29326)
**Author:** [@wallaceb](https://forum.sierrawireless.com/u/wallaceb)\ **Replies:** 2\ **Last updated:** [April 6, 2023, 11:01pm UTC](https://forum.sierrawireless.com/t/rc7611-1-rebooting-during-lte-tx-test/29326 "2023-04-06T23:01:55Z")
Looping 12.5 LTE RF Transmission Path Test from Sierra Wireless RC76xx Product Technical Specification Observe on random loops see the COM port close and see reset counter increment to 2 after re-connecting after shutti… --- ## [Automatic TCP session restoring on boot](https://forum.sierrawireless.com/t/automatic-tcp-session-restoring-on-boot/29419)
**Author:** [@help9help](https://forum.sierrawireless.com/u/help9help)\ **Replies:** 2\ **Last updated:** [April 3, 2023, 9:25pm UTC](https://forum.sierrawireless.com/t/automatic-tcp-session-restoring-on-boot/29419 "2023-04-03T21:25:50Z")
Hello, I have an RC7611 module configured as a TCP server and use it in the Direct Data Flow mode when a client is connected. The +KTCPCFG command allows me to open the listening socket automatically on boot. But to ent… --- ## [Where can i find band indicator hexadecimal format for RC7602-1 modem](https://forum.sierrawireless.com/t/where-can-i-find-band-indicator-hexadecimal-format-for-rc7602-1-modem/28813)
**Author:** [@mrinmoy](https://forum.sierrawireless.com/u/mrinmoy)\ **Replies:** 11\ **Last updated:** [January 20, 2023, 2:40pm UTC](https://forum.sierrawireless.com/t/where-can-i-find-band-indicator-hexadecimal-format-for-rc7602-1-modem/28813 "2023-01-20T14:40:39Z")
Hi, Where can i find band indicator hexadecimal format for RC7602-1 modem. or please share if any data sheet available for that. --- ## [RC7620 incoming DTMF tone problem](https://forum.sierrawireless.com/t/rc7620-incoming-dtmf-tone-problem/28810)
**Author:** [@GaryATodd](https://forum.sierrawireless.com/u/GaryATodd)\ **Replies:** 2\ **Last updated:** [January 20, 2023, 8:52am UTC](https://forum.sierrawireless.com/t/rc7620-incoming-dtmf-tone-problem/28810 "2023-01-20T08:52:14Z")
If my RC7620 (EE SIM) dials out on 4G to my O2 phone on 4G then I can use an external DTMF chip to generate DTMF tones into the RC7620 and I can hear these on my phone (although a little distorted). However, if I press … --- ## [RC7620-1 +KFTPRCV Does not receive "CONNECT"](https://forum.sierrawireless.com/t/rc7620-1-kftprcv-does-not-receive-connect/25290)
**Author:** [@mt\_0x](https://forum.sierrawireless.com/u/mt_0x)\ **Replies:** 11\ **Last updated:** [January 19, 2023, 4:46pm UTC](https://forum.sierrawireless.com/t/rc7620-1-kftprcv-does-not-receive-connect/25290 "2023-01-19T16:46:42Z")
Hi, We are trying to download a file from FTP using AT+KTCPRCV on RC7620-1 (SWI9X07H\_00.08.07.00 0ce4c1 jenkins 2021/03/17 02:18:20) After AT+KFTPCFG, we issue AT+KTCPRCV=1,255 and the data start coming down but no “C… --- ## [RC7620 (FW 8.07): "AT+KSLEEP=2" command does not seem to work correctly](https://forum.sierrawireless.com/t/rc7620-fw-8-07-at-ksleep-2-command-does-not-seem-to-work-correctly/25982)
**Author:** [@help9help](https://forum.sierrawireless.com/u/help9help)\ **Replies:** 10\ **Last updated:** [January 18, 2023, 10:44am UTC](https://forum.sierrawireless.com/t/rc7620-fw-8-07-at-ksleep-2-command-does-not-seem-to-work-correctly/25982 "2023-01-18T10:44:10Z")
Hi Guys, I want to execute the “AT+KSLEEP=2” command to disable sleep mode for UART1. UART1 sleep mode is disabled for the current session only. Although the “AT+KSLEEP=2” command does keep its state after a power cycle… [Previous page](https://forum.sierrawireless.com/c/modules/rc76/130.md?page=1) [Next page](https://forum.sierrawireless.com/c/modules/rc76/130.md?page=3)