Вот, на вторые сутки проб имею следующее на этой прошивке (AVC56 2.1.12 Gamma, х2 и v.90 выключены в регистрах) скорость устраивает и при терминале на офис рвется не часто (раз в полчаса - час).

За 18-ть минут на 2-м Геннадиче:

DeviceName: Courier V.Everything EXT PnP (V.90&x2)
UserInit:
----------------------------------------------------------------------
Advanced Voice Courier External Link Diagnostics...

Chars sent 876903 Chars Received 1954954
Chars lost 0
Octets sent 876903 Octets Received 1954954
Blocks sent 28659 Blocks Received 21715
Blocks resent 45
Retrains Requested 0 Retrains Granted 0
Line Reversals 0 Blers 58
Link Timeouts 1 Link Naks 5

Data Compression NONE
Equalization Long Caller's Number: UNK
Fallback Enabled Remote ID: UNK
Protocol LAPM 128/15
Last Call 00:18:17

Disconnect Reason is DTR dropped
Extended Link Diagnostics...

Modulation Protocol V.34+
Speed 33600/31200
Carrier Freq ( Hz ) 1959/1959
Symbol Rate 3429/3429
Trellis Code 64S-4D/16S-4D
Nonlinear Encoding ON/OFF
Precoding ON/OFF
Shaping OFF/OFF
Preemphasis Index 6/6
Recv/Xmit Level (-dBm) 18.9/12.2
SNR ( dB ) 39.3
Near Echo Loss ( dB ) 20.9
Far Echo Loss ( dB ) 49.4
Roundtrip Delay (msec) 8
Timing Offset ( ppm) -864
Carrier Offset ( ppm) 144
Speedshifts 4 requested(2 up, 2 down)/1 granted

Advanced Voice Courier External Channel Probe...

-18 . x x X X X X X X X X x x x x x x x x x x . . . . 1
-20 x X X X X X X X X X X X X X X X X X X X X X X . . 3
-22 X X X X X X X X X X X X X X X X X X X X X X X x . 5
-24 X X X X X X X X X X X X X X X X X X X X X X X X . 7
-26 X X X X X X X X X X X X X X X X X X X X X X X X x 9
Level --------------------Frequency-------------------- Attn
0 0 0 0 0 0 1 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3
1 3 4 6 7 9 0 2 3 5 6 8 9 1 2 4 5 7 8 0 1 3 4 6 7
5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Modem Session Analyzer
-------------------------------------------------------------
Session time : 00:18:17
Retrains issued/granted/auto : 0/0/NA
Renegs issued/granted : 4/1
TX Rate last/init : 31200/NA
RX Rate last/init : 33600/33600
Error control protocol/frame size : LAP-M/128
Average RX chars per frame : 90
TX frames/errors : 28659/45 (0.16
RX frames/errors : 21715/58 (0.27
Potential upstream cps : 3635
Potential downstream cps : 3911

P.S.
Пожалуйста, кого не сильно обременит, дайте совет где и что крутить дальше...