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S22.......MSG BITS
S23.......MAKE BUSY
FEATURE BUTTON
NUMBER
S24.......V.120
LOW LAYER COMP.
S25.......DTR DELAY
S26.......DTE RATE ADJUST
S27.......PPP MODE
61200051L1-1D
Miscellaneous message bits (bit 8 is most significant
bit).
Bit 5 = bit 6 = bit 7 = 1 allows connect message with
baud rate.
Bit 5 = bit 6 = bit 7 = 0 connect message without baud
rate.
Number assigned by the telephone company when
by user. Make Busy option is translated for
requested
an ISDN line and the feature button number must be
entered into this S register. Useful for Hunt-Group
operation.
Range = 0 to 255
0 is default.
Value determines whether or not the V.120 bit is set
in setup messages for CCITT V.120 calls. Some terminal
adapters require that this bit be set to connect V.120
calls.
0 = Set V.120 bit in call setup message (default)
1 = Do not set V.120 bit in call setup message
Value determines the minimum time a change of state
on DTR must last before the unit responds. The value
is in hundredths of seconds.
Range = 0 to 255
5 is default (50 milliseconds)
Determines CLEAR CHAN protocol automatically re-
ducing DTE RATE for non-64K call types.
0 = CLEAR CHAN changes DTE rate from 64K to
56K for non-64K call types (default).
1 = CLEAR CHAN does not change DTE rate from
64K to 56K for non-64K call types.
Value determines whether PPP will be a single-link or
multilink connection.
0 = Single-link operation (default)
1 = Multi-link operation
2 = Use compression
ISU 2x64 Dual Port ISDN Service Unit User Manual
Appendix D: S-Register List
111
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