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Appendix D: S-Register List
112
ISU 2x64 Dual Port ISDN Service Unit User Manual 61200051L1-1D
S30.......DTE CTS Controls the operation of the DTE connector CTS line.
0 = Follows RTS
1 = Forced CTS (default)
S31.......DTE RTS Controls operation of the RTS line.
0 = 1 ms delay (default)
17 = 18 ms delay
S32.......DTE DSR Controls the operation of the Data Set Ready signal on
the DTE connectors.
0 = Force DSR on always (default)
1 = DSR active only during a call
2 = DSR active only when network interface is on
S33.......DTE CD Controls the operation of the Carrier Detect line on the
DTE connectors.
0 = Force CD on always
1 = CD is active during a call (default)
2 = LOCD
3 = Off Link Down
S34........DTE DTR Determines how the ISU 2x64 responds to changes in
DTR.
0 = Ignore DTR (default)
1 = Force AT command mode when DTR is off
2 = Dump incoming call when DTR is off
4 = Hang up incoming call when DTR is off
8 = Hang up outgoing call when DTR is off
40 = Dial #0 if on
60 = Dial/Answer if on
72 = Off on dial #0
S35........DTE CONN Determines which is the current operating DTE con-
nector.
0 = RS-530 connector (default)
1 = V.35 connector
2 = EIA-232
S40.......BOND TXINIT Specifies the number of seconds the originating end-
point attempts to detect the BONDING negotiation
pattern from the answering endpoint before deter-
mining the BONDING call has failed.
0 to 256, 10 sec is default