Comtest Networks MTAS-192 METALLIC TEST ACCESS SYSTEM User Manual

Page 36

Comtest Networks

CT-IG-MTAS192-2008-v1_8.doc

MTAS-192

Installation Guide

June 2006

4.2.5 Connecting to the Control Card

There are three connectors on the control card faceplate providing communication with
the MTAS-192.

• Ethernet : A shielded RJ-45 jack allows communications with the MTAS-192 via

telnet (port 9090) or raw TCP/IP socket (port 9099).

• COM 1: A shielded, female DB-9 connector acts only as a debug port.

• AUX 1: A shielded, female RJ-45 jack provides serial communications. The device

communicates at 9600 baud, with 8 data bits, 2 stop bits, no parity and no flow
control.

NOTE: See Appendix A, sections 0: “Ethernet Cabling” and 0: “Serial Cabling” for cable
pinouts.

4.2.6 Connecting the Test Head to the MTAS-192 Shelf

Step 1. Connect the test head to the MTAS via the TAPs (Test Access Paths/Link)

shielded RJ-45 jack on the left side of the MTAS backplane using the TAL
custom cable built per Appendix A, section 0: “Test Access Link (TAL) Bus
Extender”.

NOTE: For dual test head operation, the far end of the cable must be split and
terminated on a terminal block that will allow access to the two internal TAP buses, TAP
1 and TAP 2, one for each test head.

4.2.7 Daisy-chaining Multiple MTAS-192 Shelves

Up to 12 MTAS shelves may be daisy-chained together. There is one master MTAS
shelf and there can be up to 11 slave MTAS shelves, for a total of 12 MTAS shelves.
Connecting them are two types of MTAS buses: the Test Access Link (TAL) extender
bus (master DATA 1 to slave TAPs/DATA 2 connector) and ISCL bus (master COMM 1
to slave COMM 2 connector).

NOTE: Ensure that MTAS-CM control card is configured as chassis ID=0 (Factory
default setting). Configure each slave (MTAS-CS) control card with a unique chassis
(shelf) ID between 1 and 11, for each master/slave group of 12 MTAS shelves to which
it belongs. Check the DIP switch settings in the MTAS Control Card Address DIP
switch Settings table (Table 15) in Appendix A (section 0: “MTAS Control Card Shelf
Address DIP Switch Settings”) to ensure that the shelf is configured correctly. There is
no requirement to set the switches to correspond to the PHYSICAL position in the
daisy-chain.