Meridian America Link/Customer Controlled Routing manual Host connection considerations

24Chapter 2: Overview of Meridian Link

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.

553-3202-210 Standard October 1998