IDC Modems

IDC Modems

Most IDC modems are built on a Lucent (AT&T) chip set and include IS-101 command set, excluding VR models, which include Rockwell chip set.

Available Voice Codecs (AT&T chip set)
Method Bit Depth Sampling Frequencies Comment
PCM 16-bit linear 16 7200, 8000, 11025 The best sound quality
PCM 8-bit linear 8 7200, 8000, 11025 Very good sound quality
IMA ADPCM (Intel/DVI) 4 8000 Good sound quality
A-law PCM 8 8 8000 Very good sound quality
u-law PCM 8 8 8000 Very good sound quality
Available Voice Codecs (Rockwell chip set)
Method Bit Depth Sampling Frequencies Comment
PCM 8-bit unsigned 8 7200 Very good sound quality
Rockwell ADPCM 4 7200 Good sound quality
ANI in Russia

One of the most interesting things about IDC modems is that they're able to emulate Bellcore (American) Caller ID behavior after Russian ANI. Only voice models, including IDC BXLV (IDC 2814 Voice) and IDC 2814/VR modems, include this feature. All other (non-voice) models include Hardware Caller ID.

More Information

Please visit an official Inpro support site:

Modem Notes Modem Notes