3Com ISDN Modem User Manual page 129

Table B-2 S Registers (continued)
Registers Descriptions
*
S70 Dynamic Bandwidth Allocation (DBA):
0 — DBA disabled
1 — DBA enabled for outgoing calls only
2 — DBA enabled for incoming calls only
3 — Enabled for both incoming and outgoing calls (default)
S71 B Channel Protocol:
0 — QuickSelect (default)
1 — Async-Sync PPP conversion
2 — V.120
S73 V.120 Frame Type:
0 — I frame (default)
1 — UI frame
S74 V.120 Maximum Frame Size (range 240–256):
256 — Maximum frame size of 256 (default)
248 — Maximum frame size of 248 (for AdTran compatibility, use 253)
S75 Connection Delay:
Specifies whether the ISDN modem immediately answers a call or waits 2
seconds to answer. If you are using Windows NT, use the two-second delay.
0 — No delay (default)
1 — Two-second delay
S76 ISDN Call Waiting:
0 — Phone 1 Call Waiting Disabled; Phone 2 Call Waiting Disabled
1 — Phone 1 Call Waiting Enabled; Phone 2 Call Waiting Disabled
(default)
2 — Phone 1 Call Waiting Disabled; Phone 2 Call Waiting Enabled
3 — Phone 1 Call Waiting Enabled; Phone 2 Call Waiting Enabled
S77 † Call Conferencing:
0 — Disabled
60 — (default)
S78 Call Transfer:
0 — Disabled
61 — (default)
S Registers
B-7