# Modem emulation undocumented commands such as AT\*MAC?

**URL:** <https://forums.digi.com/t/modem-emulation-undocumented-commands-such-as-at-mac/12940>\
**Category:** Plug N' Play\
**Tags:** modem-emulation, connect\
**Created:** [May 12, 2014, 8:03am UTC](https://forums.digi.com/t/modem-emulation-undocumented-commands-such-as-at-mac/12940 "2014-05-12T08:03:20Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![cybergibbons](https://avatars.discourse-cdn.com/v4/letter/c/ce7236/32.png) [@cybergibbons](https://forums.digi.com/u/cybergibbons)\
**Post date:** [May 12, 2014, 8:03am UTC](https://forums.digi.com/t/modem-emulation-undocumented-commands-such-as-at-mac/12940/1 "2014-05-12T08:03:20Z")

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I am reverse engineering a legacy product that uses a Digi Connect ME. The Connect ME is running in “modem emulation” mode.

The connected system sends a few commands like:  
AT_DHCP?  
AT_MAC?

which appear to work, but I can’t see these documented anywhere.

Is there a better document than the “Digi Connect® Family Command Reference”?

[http://ftp1.digi.com/support/documentation/90000566\_N.pdf](http://ftp1.digi.com/support/documentation/90000566_N.pdf)