this post was submitted on 16 Mar 2024
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submitted 9 months ago* (last edited 9 months ago) by TCB13 to c/[email protected]
 

Hello,

So I have a Motorola SM56 USB Data Fax Modem (aka Apple USB Modem for some people) and according to information online this modem supports V.92, Caller ID, wake-on-ring and most importantly telephone answering (V.253).

At a place I happen to have an old telephone analog line that gets calls and unfortunately I can't get rid of. Any ideias / links / software on how can I use the modem + a low end box / ARM SBC to "digitize" the phone line into a generic SIP / VOIP that I can then connect to using MicroSIP on another computer?

Thank you.


Update on this:

I just tried the modem under Windows with a few programs such as Phone Dialer Pro and the built in dialer.exe and while the modem can detect incoming phone calls and place calls I can't pass the audio back to the operating system / phone software.

I did some research about the SM65 and it seems like it was designed to have an headset directly attached to it like on those PCI cards that also use it:

The built in COM port of the modems seems to be only usable to control the modem via AT commands and can't be used to pass audio form and to the system.

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[–] [email protected] 1 points 9 months ago (1 children)
[–] TCB13 2 points 9 months ago (1 children)

Thanks for the tip, that model clearly says it supports it... then there's https://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht813 that should work but the wording on the website isn't that clear.

Even if overkill I guess I'll go with the HT318. Thanks.

[–] [email protected] 1 points 9 months ago (1 children)

I wouldn't call it overkill honestly, it's just the right tool for the job :) I have some of their gear and I'm happy enough with it.

[–] TCB13 1 points 9 months ago (1 children)
[–] [email protected] 1 points 9 months ago

Oh yeah you're totally right, my bad! 😅