Modems

Strings - General

Disable 56k (x2)
Disable 56k (K56Flex)
The AT command set.

Strings - Specific Modems

Commwave 28.8 Modems
EuroViva Modems
HSP Modems
MSP3800SP-W 56k
MWAVE Modems

Strings - ISDN Terminal Adapters

Motorola Bitsurfer ISDN TA
ZyXel ISDN TA

Common Questions

Why do I connect at speeds lower than 56K when using my 56K capable modem?
Why do I connect at speeds lower than 56K when using my 56K capable modem? - Short version