American Telecom AM64/128A manual RS530 Interface Module, 21bis Interface Module

AM 64/128A User Manual Appendix B – Internal Link Settings

Interface Modules:

RS530 Interface Module:

J1 – Circuit 103 Termination.

J2 – Circuit 113 Termination.

J1 – V36 and RS530 Circuit 103 (Transmit data) Circuit Termination – This link connects a 120 ohm load resistor across the 103 circuit in position 1-3. This helps maintain signal rise times and minimises reflections at greater than 9.6 kbps over long lines. At lower rates and over short lines the termination resistor may be omitted, (link set position 1-2).

J2 – V36 and RS530 Circuit 113 (External Signal Element Timing) Circuit Termination – This link connects a 120 ohm resistor across the 113 circuit in position 1-3. This helps maintain signal rise times and minimises reflections at rates greater than 9.6 kbps over long lines. At lower rates and over short lines the termination resistor may be omitted, (link set position 1-2).

X.21bis Interface Module;

There are no links on the X.21BIS Interface module

G.703 Interface Module;

There are no links on the G.703 interface module.

WARNING

Only authorised personnel can be allowed to open the Line Terminating Unit case to change the link settings. Misuse or any modifications carried out to this unit other than in accordance with the instructions supplied, will invalidate the guarantee CE approval.

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