Meridian Link/Customer Controlled Routing, Installation And Upgrade Manual

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24 Chapter 2: Overview of Meridian Link
553-3202-210 Standard October 1998
Host connection considerations
The link to the host computer should be installed and configured following
the host manufacturerÕs recommendations. The host may establish one of
the following, depending on the type of host computer:
¥ an X.25 Switched Virtual Circuit (SVC) connection over a serial
RS-232 (up to 19.2 kbps) physical interface
¥ TCP/IP connection over an Ethernet LAN
If the host computer is located more than 15 m (50 ft) from the IPE Module
or Application Module with an RS-232 connection, limited-distance
modems must be used at each end to carry the data signal (using standard
data communication techniques). You may select and install limited-
distance modems to connect the host computer and the IPE Module or
Application Module. Nortel neither supplies nor recommends a particular
make or model of modem for this purpose. If diagnostic activities indicate
that problems exist with the modems, Nortel support personnel will
recommend that the customer call in service representatives for the modem
equipment.
Note: When setting up a redundant Meridian Link, two host
connections are required, and two AML links must be configured on
the Meridian 1. Also, two communication paths (either two X.25 ports
or two TCP/IP addresses) must be set up to connect with two Meridian
Link modules.
Ethernet LAN-based host
To use an Ethernet LAN-based host computer, a local area network (LAN)
must be installed between an Ethernet LAN-based host computer and the
Meridian Link/CCR IPE Module or Application Module. Each IPE Module
or Application Module must have the Network Service Extension (NSE)
software running to provide TCP/IP service.
The Ethernet LAN-based host connection is compatible with IEEE802.3
Ethernet Standards and Ethernet II Standards using 10-based T, 10-based 2,
10-based 5, and fiber optics.