# AT command on RV50X with TCP

**URL:** <https://forum.sierrawireless.com/t/at-command-on-rv50x-with-tcp/34765>\
**Category:** Uncategorized\
**Created:** [April 25, 2025, 11:49am UTC](https://forum.sierrawireless.com/t/at-command-on-rv50x-with-tcp/34765 "2025-04-25T11:49:20Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![nicolas.davy](https://avatars.discourse-cdn.com/v4/letter/n/2acd7d/32.png) [@nicolas.davy](https://forum.sierrawireless.com/u/nicolas.davy)\
**Post date:** [April 25, 2025, 11:49am UTC](https://forum.sierrawireless.com/t/at-command-on-rv50x-with-tcp/34765/1 "2025-04-25T11:49:21Z")

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I would like to use AT commands over tcp connection from my RV50x modem.

I understood that it was possible to use the ssh/telnet port to do this. Unfortunately I can connect to port 2332 (default port for AT (telnet/ssh) in acemanager) but I don’t have the impression of being in AT mode. Indeed the AT commands do not return any responses or errors. Please enlighten me on how to implement the ssh/telnet port with AT commands.

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**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\
**Post date:** [April 28, 2025, 3:58am UTC](https://forum.sierrawireless.com/t/at-command-on-rv50x-with-tcp/34765/2 "2025-04-28T03:58:20Z")

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Hi @nicolas.davy,

Please refer to section AT (Telnet/SSH) on pages 251–252 of [source.sierrawireless.com/resources/airlink/software\_reference\_docs/airlink-rv-series—configuration-guide/](https://source.sierrawireless.com/resources/airlink/software_reference_docs/airlink-rv-series---configuration-guide/) for instructions on using the Telnet or SSH protocol to connect to RV50X and send AT commands.  
If you follow the instructions in the document but still encounter errors, please send me a screenshot of ACEmanager (Services \> Telnet/SSH), the log, and the template log so I can check it.

Thanks,

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**Author:** ![nicolas.davy](https://avatars.discourse-cdn.com/v4/letter/n/2acd7d/32.png) [@nicolas.davy](https://forum.sierrawireless.com/u/nicolas.davy)\
**Post date:** [April 29, 2025, 12:00pm UTC](https://forum.sierrawireless.com/t/at-command-on-rv50x-with-tcp/34765/3 "2025-04-29T12:00:04Z")

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Thanks for your help, you’re right. After checking the settings, I tried again in raw mode (with Putty) and it works. However, I want to change the modem’s PIN and the one contained in the SIM card itself, but I couldn’t find the AT command in the documentation.

Do you know an equivalent of the following commands compatible with the RV50x modem:  
AT+CPWD=“SC” “0000”, “1234” changer le code pin de 0000 a 1234  
AT+CPIN=“1234”

Thank you for your help

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**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\
**Post date:** [May 2, 2025, 7:12am UTC](https://forum.sierrawireless.com/t/at-command-on-rv50x-with-tcp/34765/4 "2025-05-02T07:12:18Z")

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Hi @nicolas.davy,

On routers with ALEOS 4.7.0 or later, you can use AT Commands to enable, disable, or change the SIM PIN the SIM card requests when the router boots up. For details, see \*CHGSIMPIN on page 430 and \*ENASIMPIN on page 433 on [https://source.sierrawireless.com/resources/airlink/software\_reference\_docs/airlink-rv-series---configuration-guide/#sthash.YRYQhEoT.dpbs](https://source.sierrawireless.com/resources/airlink/software_reference_docs/airlink-rv-series---configuration-guide/#sthash.YRYQhEoT.dpbs).

Thanks,