ZyXEL Communications Omni 288S - Manual (Page 43)

Chapter 5 - Synchronous Mode Operation
5-1
Chapter 5 - Synchronous Mode Operation
This chapter introduces you to the use of the Omni 288S for synchronous
operation. The modem can be used as a synchronous modem when it is connected
to a synchronous computer or terminal. It is of course necessary to make sure that
the remote modem and system are also set to synchronous. Synchronous operation
applies to all of the non-FSK modes the modem is supplied with. Before
synchronous transfers are started, some initial settings should be made.
V.25bis Command Set
To enable V.25bis commands use the AT*I1 command.
For synchronous applications, the modem is permanently set in normal situations
for use with one application. Save the desired settings in the power-on profile,
and the modem will be initialized to synchronous mode (&M3) with V.25bis
command enabled (*I1) when turned it is turned on.
A special command RST is provided to get the modem back to asynchronous AT
command mode from V.25bis mode. You can enter this RST command in either
synchronous or asynchronous V.25bis mode.
Syntax Command with Parameters* Description
CRN CRN ** Call request with number provided.
CRS CRS n Call request with number from
memory, 0 # n # 49;
n is the memory location.
PRN PRN n; Saves to address n
(0 # n #49).
RLN RLN*** Requests list of all stored numbers.
DIC DIC Ignores incoming call.
CIC CIC Accepts incoming call.
CFI CFI XX Call failure indication:
ET Engaged Tone.
NS Number is not stored.
RT RING Tone.
AB Abort Call.
NT Answer Tone is not detected.
INC INC Incoming call.
VAL VAL Valid.
INV INV Invalid.
LSN LSN n; List of stored numbers.
(Response to RLN)
RST RST Changes to the asynchronous
AT command mode.