Rockwell HCF

Rockwell HCF

These modems are built on a Rockwell HCF chip set, usually come as PCI devices and include IS-101 command set.

Available Voice Codecs 
Method Bit Depth Sampling Frequencies Comment
PCM 16-bit linear 16 7200, 8000 The best sound quality
PCM 8-bit linear 8 7200, 8000 Very good sound quality
PCM 8-bit unsigned 8 7200, 8000 Very good sound quality
IMA ADPCM (Intel/DVI) 4 7200, 8000 Good sound quality
A-law PCM 8 8 7200, 8000 Very good sound quality
u-law PCM 8 8 7200, 8000 Very good sound quality
Troubleshooting

Please make these changes to the configuration in order to make it work:

Modem Notes Modem Notes