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Network LAN switch access

Definity LAN access via cisco router AUX port by RFWatts
Posted: 22 Jul 03

Extracted from:

"Setting up remote access
To the DefinityÆs terminal port
Prepared by
Mike Dozier,

Using a Cisco routerÆs Aux port

This document assumes that you know basic Cisco configuration, and that you
have enough router experience to configure various interfaces, including the
Ethernet interface. Your router should be configured with at least one Ethernet
interface for your network. You do not need to set up any routes unless you want
to, or if the router is used for other purposes. If you have a Cisco router with an
available Aux port, you can set up a reverse telnet session to provide telnet
access to a Definity switch. To do this, you must first configure the aux port with
the following parameters:

line aux 0
ò no exec
ò password abc123
ò absolute-timeout 7
ò session-limit 1
ò login
ò modem InOut
ò transport preferred telnet
ò transport input all
ò telnet break-on-ip
ò databits 7
ò parity space
ò stopbits 1

You should require a password on the port to prevent unauthorized access. In
this example, the password has been set to ôabc123ö. This password is in
addition to the password required to login to the switch.
Next you will need to connect a cable between the aux port and the switch
terminal port. The easiest method is to use a Cisco console cable (P/N 72-1259-
01), and a Cisco modem mod-tap (P/N 29-0881-01) to connect the terminal port
of the switch to the aux port of the router. You can also construct a cable with
the following pinout:
DB-25M Pin No. RJ-45 Pin No.
2 3
3 6
4 1
5 8
7 4, 5
8 7
20 2

Now you need to determine the port number that your aux port is using in the
router. To do this, enter ôshow lineö from the router console. Find the aux port,
and record the TTY number. Now that you have the TTY number, and the IP
address, you should be able to configure a telnet session to the attached switch.
For the TCP port number, you will need to add 2000 to your TTY number. For
example, if your aux port uses TTY number 1, and your IP address is, then you would establish your telnet session as follows:
Telnet 2001
Of course, a telnet session to port 23 will provide access to the router console. If
you are using DSA, you will need to configure the connection as ônetworkö, and
specify the port as 2001.

Technical References
General Modem Information
USR Commands & Technical Reference
Cisco Technical Support Website
Equinox MDS-10 Installation Manual

Back to Avaya: CM/Aura (Definity) FAQ Index
Back to Avaya: CM/Aura (Definity) Forum

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