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Chapter 14: DTE Interface Commands snd S-Register Settings
&M2 or &Q2
Synchronous operating mode where the ISDN TA/V
dials the number stored in directory location 1 when
the DTR signal turns off and then on (Control signal
in X.21 mode), on the DTE interface. A synchronous
interface card must be installed in your PC.
&M231 or &Q231
Asynchronous mode with the AT command set
disabled.
&M232 or &Q232
Asynchronous mode using asynchronous V.25bis
command of the ISDN TA/V. The AT command set
is disabled (refer to
Chapter18
for details of the
V.25bis dialing commands).
&M233 or &Q233
Synchronous mode using bisynchronous V.25bis
command of the ISDN TA/V. The AT command set
is disabled (refer to
Chapter 18
for details of the
V.25bis dialing commands). A synchronous interface
card must be installed in your PC.
&M234 or &Q234
Synchronous mode using HDLC V.25bis command
of the ISDN TA/V. The AT command set is disabled
(refer to
Chapter 18
for details of the V.25bis dialing
commands). A synchronous interface card must be
installed in your PC.
&M236 or &Q236
Synchronous mode with the AT command set
disabled.
&M4 or &Q4
Asynchronous operating mode where the ISDN
TA/V dials the number stored in directory location 1
when the DTR signal turns off and then on, on the
DTE interface.
14.2 DTE Electrical Characteristics Conformance
The 25-pin DTE interface connector can be configured to electrically
conform to one of a variety of ITU specifications, and is therefore compatible
with a number of operating environments.
The DTE interface cable supplied with the ISDN TA/V is compatible with the
connector being configured to supply the control signals of V.24/V.28 only.
To configure the interface to conform to V.36 or X.21 (V.11), connect a cable
whose wire to pin assignments match those described in
Appendix A
of this
manual to the DTE connector on the rear panel of the ISDN TA/V. The
ISDN TA/V will detect which cable has been connected to it, and will
configure the interface accordingly.
