# ...Modem not responding

**URL:** <https://forum.sierrawireless.com/t/modem-not-responding/990>\
**Category:** Open AT\
**Created:** [January 4, 2007, 4:55am UTC](https://forum.sierrawireless.com/t/modem-not-responding/990 "2007-01-04T04:55:41Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![cbru](https://avatars.discourse-cdn.com/v4/letter/c/9f8e36/32.png) [@cbru](https://forum.sierrawireless.com/u/cbru)\
**Post date:** [January 4, 2007, 4:55am UTC](https://forum.sierrawireless.com/t/modem-not-responding/990/1 "2007-01-04T04:55:41Z")

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When I power the modem, M1213A, the red led comes on.  
When I connect the modem to the serial port, the red led gets turned off.

I am not able to establish any AT connection with the modem.

Any great ideas? Thanks.

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**Author:** ![tomalex](https://avatars.discourse-cdn.com/v4/letter/t/71e660/32.png) [@tomalex](https://forum.sierrawireless.com/u/tomalex)\
**Post date:** [January 4, 2007, 10:22am UTC](https://forum.sierrawireless.com/t/modem-not-responding/990/2 "2007-01-04T10:22:46Z")

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Why did you post this in the IP topic?

If you look around the forum, you can find answers for your problem.

Best Regards,

tom