3Com 3C900B Installation And Operating Instructions Manual page 135

Register Default
S13 (cont.)
*
The 1.5K-byte non-ARQ buffer allows data transfer with
without using flow control.
The 128-byte option lets remote users with slower modems keep data you're sending from scrolling off their
screens. When remote users send your computer an XOFF (Ctrl-S) and you stop transmitting, the data in transit
from your modem's buffer doesn't exceed the size of their screen.
This is also very helpful in situations when a remote modem/printer application is losing characters.
S15 0
T
ECHNICAL
Function
Bit Value Result
4 16 At power on/reset, Auto Dial the number stored in
NVRAM at position 0.
5 32 Reserved
6 64 Disable quick retrains.
7 128 Disconnect on escape code.
Bit-mapped register setup. To set the register, see instructions for S13.
Bit Value Result
0 1 Disable ARQ/MNP for V.22.
1 2 Disable ARQ/MNP for V.22bis.
2 4 Disable ARQ/MNP V.32/V.32bis/V.32terbo.
3 8 Disable MNP handshake.
4 16 Disable MNP level 4.
5 32 Disable MNP level 3.
Q R
UICK EFERENCE
Xmodem- and Ymodem-type file transfer protocols
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