2.3.33
The following issues were fixed:
Corrected verbose 31666 connect message to 30666
Corrected &A2 PCM (/V9x) verbose and numeric connect messages
Corrected disable v34 function (S56.6=1)
Corrected disable v32bis function (S34.0=1)

The following features were modified:
HST is disabled by default (s13=32)
Quick connect is disabled by default (+PQC=3)

2.3.31
The following issues were fixed:
Corrected link timeout issue
Corrected 2400 connect issue to certain modems
Mexico PTT enhancement for DTMF levels
Korea PTT enhancement for TX levels
Brazil PTT enhancement in AT command set
Corrected issues in DTMF security

The following features were implemented:
Added parity and wordlength values to #UD diagnostics

2.3.15
The following issues were fixed:
Fax sending and receiving is not reliable at all speeds
ATO1 retrain will flatline modem in v34 modes

The following features were implemented:
W functionality was modified to wait for actual dial tone and not dial on ring back energy

2.3.12
The following issues were fixed:
Carrier Loss redial (s69) does not work
Leased Line (&L1) does not work
&T1 (analog loop back) will fail on first power up until modem goes off hook.

2.2.09
Original Release