0049-2702-XXX Alliance Series Modems – USER MANUAL
08/05/2010
Rev. A
Page 136 of 197
Dialer Mode (DIAL V25bis Screen)
If you enable the V.25bis autodialer using the Dialer Mode option, no other options will be
changed. To enable the autodialer this way, select DIALER from SETUP screen 2. Then select
the V.25bis data protocol that is appropriate for the DTE to be used: asynchronous (V25 Async
selection), synchronous character oriented (V25 Syn_c) or synchronous bit oriented (V25
Syn_b). All three protocol selections enable the V.25bis autodialer and select the indicated
protocol at the same time.
DTR Dialing in V.25bis Mode
An alternative to using the V.25bis
CRS
command to dial a stored number is to use the DTR
dialing option. With DTR dialing enabled, the autodialer will dial the number stored in the
phone cell displayed in the front panel AUTO-DIAL screen when DTR goes high for at least 50
ms.
To enable V.25bis DTR dialing, use the Summary Setup feature (as described in Appendix C) to
change the parameter for V25bis DTR dialing to 1. Do not select DTR dialing via the front
panel DIALER screen; this will not enable DTR dialing for V25bis mode. V.25bis DTR dialing
will function only if the V25bis DTR dialing parameter is enabled (set to 1) and the V.25bis
autodialer is enabled.
V.25bis AUTODIALER COMMANDS
In asynchronous applications, V.25bis commands are issued directly from the DTE keyboard or
through communications software. In synchronous applications, the V.25bis commands can be
used to facilitate computer-controlled communications.
Punctuation and spaces may be used with V.25bis commands for clarity, but they are not
required. If used, they will be ignored by the modem. One exception is the colon (
:
), which
instructs the autodialer to wait for a dial tone.
The V.25bis commands are described below and are summarized in Table 5-1. See Table 5-2 for
explanation of the codes that may be displayed in response to commands.
CIC – Connect next incoming call
The
CIC
command instructs the modem autodialer to
answer the next incoming call. After the modem goes off hook, the modem will answer the next
call only if auto-answer is enabled from the front panel.
