Cabletron Systems Netlink FRX8000, User Manual

Page: 131 / 468

Configuring X.25 9-13
Modem Pool ID
identifies a type of modem (determined by the user). More than one string can be
assigned to the same ID.
INI String
will be sent verbatim to the modem during initialization. It is intended to contain
specific information that will be read by the modem (configuration, operation, etc.).
Do not include the string
AT*V3
, as this is sent by the node later.
Sending it too soon will lock up the LP and cause this procedure
to miss a step.
Initializing a Modem
Here is the normal sequence for initialization of a V.25bis modem:
1. After receiving a Port Enable from the FRX8000 software, DTR will be asserted
on the port.
2. If the modem is powered on and in AT mode, it will return CTS.
3. The node will send the modem initialization string.
4. The modem should return an OK or an error.
5. If the node receives an OK, it will send the string
AT*V3
, which will put the
modem into V.25bis synchronous mode.
If the node does not receive an OK, it will assume the modem is already in V.25
mode. The node will then send a message to reset the modem to AT mode, and
will repeat steps 3–5 of this procedure, up to the number of times specified for
Line Setup Retries
in the Port record.
If the modem still does respond, it will be put into
Failed
state.
Table 9-3 Modem Initialization Parameters
Parameter Valid Values Default Value
Description up to 24 characters none
Modem Pool ID 0–255 0
INI String up to 35 characters none