Configuring N74/7500 Pdn Ports - Cabletron Systems Netlink FRX8000 User Manual

INI String
Initializing a Modem

Configuring N74/7500 PDN Ports

Configuring Inter-Nodal Trunks
will be sent verbatim to the modem during initialization. It is intended to contain spe-
cific information that will be read by the modem (configuration, operation, etc.).
Do not include the string
Sending it too soon will lock up the LP and cause this procedure
to miss a step.
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
If the modem still does respond, it will be put into
N74/7500 ports configured as PDN support logical trunk connections over a public
data network to other N74/7500s and to FRX8000 Switches (via logical X.25 trunk
ports on FRX8000). To configure an N74/7500 port as PDN, you must configure two
records: one for the physical port (unless it already exists) and one for the logical port
that will reside on the physical port and will be the logical trunk.
Press , then from the Ports Selection Menu (or
[A] [C]
Main Menu). When prompted, enter:
(of the node containing the port):
Node ID
(of the LP containing the port):
LP ID
: for a physical port on an RLP,
Port 0–7
only), for a logical port. (If you specify a logical port, enter the number of
8–63
the associated physical PDN port when asked.
Up to eight logical ports can be configured on a physical PDN port.
Any other requested information, noting the values in
at a prompt to specify the default value.)
AT*V3
in the Port record. (See page 7-8.)
0–7
0–3
, as this is sent by the node later.
state.
Failed
from the
[A], [D], [A], [C]
. (Default is the "local" node.)
1–250
. (Default is .)
0
for a port on an AST LP (N74/7500
Table 7-3. (Press
[Enter]
7-11