ZOOM Telephonics |
Zoom Telephonics modems can be powered by either Lucent or Rockwell chip sets. Refer to this table to determine which one is for you:
Your modem | You should select | Chip set |
---|---|---|
ZOOM(r) FAX/MODEM 56K Voice DualMode EXT model 2949 | Zoom External 56K Voice | Rockwell |
ZOOM(r) FAX/MODEM 56K Voice Video DualMode INT model 2822-25-06 | Zoom Internal 56K Voice | Rockwell |
ZOOM(r) FAX/MODEM 56K Voice DualMode PCI model 2925 | Zoom 56K PCI Faxmodem | Lucent (LT) |
ZOOM(r) FAX/MODEM 56K Voice DualMode EXT | Zoom External 56K Voice LT | Lucent (LT) |
ZOOM(r) FAX/MODEM 56K Voice Video DualMode INT | Zoom Internal 56K Voice LT | Lucent (LT) |
Method | Bit Depth | Sampling Frequencies | Comment |
---|---|---|---|
PCM 16-bit linear | 16 | 7200, 8000, 11025 | The best sound quality |
PCM 8-bit unsigned | 8 | 7200, 8000, 11025 | Very good sound quality. Though this codec is not in the list of supported algorithms, Lucent modems seems to use this codec instead of linear PCM. |
PCM 8-bit linear | 8 | 7200, 8000, 11025 | Very good sound quality. If the program produces distorted sound with unsigned PCM, use this codec. |
IMA ADPCM (Intel/DVI) | 4 | 8000 | Considerable sound quality |
A-law PCM 8 | 8 | 8000 | Very good sound quality. Sometimes may have a problem with playback. |
u-law PCM 8 | 8 | 8000 | Very good sound quality. Sometimes may have a problem with playback. |
Since these modems are Lucent compatible, the Lucent LT Win Modem FAQ at 56K.com is an appropriate resource for them.
Method | Bit Depth | Sampling Frequencies | Comment |
---|---|---|---|
PCM 8-bit unsigned | 8 | 7200 | Very good sound quality |
Rockwell ADPCM | 4 | 7200 | Good sound quality |
Read more about Rockwell-compatible modems here.