ADTRAN 1200305L1 Modules E1/PRA-1 Test PRT, Modules E1/PRA-1 Test LOC LB, Information

ATLAS 550 System Manual Section 4, User Interface Guide

information.

MODULES (E1/PRA-1) > CONFIGURATION > TS16 SPARE

Write security: 3; Read security: 5

TS16 in CAS frame 0 contains 3 spare bits: 0000XYXX where ‘X’ marks a spare bit and ‘Y’ marks an alarm indications to the remote end. Enter a decimal number whose masked 4 LSB (least significant bits) are inserted into TS0 in CAS frame 0. Refer to CCITT G.704 for more information.

MODULES (E1/PRA-1) > CONFIGURATION > INTL BIT

Write security: 3; Read security: 5

Bit 0 in all non-CRC4 frames is reserved for international use. They may be used nationally if the path does not cross an international border. If not specifically used, the bits should be set to ‘1’ on paths crossing a border. Enter the international bit value of 0 or 1. Refer to CCITT G.704 for more information.

MODULES (E1/PRA-1) > CONFIGURATION > LINE BUILD OUT

Write security: 3; Read security: 5

Sets the line build out for the E1 interface to either 75 Ω (BALANCED or UNBALANCED) or 120 Ω (BALANCED

or UNBALANCED).

MODULES (E1/PRA-1) > TEST

Write security: 5; Read security: 5

These options initiate different types of tests and display test results.

MODULES (E1/PRA-1) > TEST > PRT

Write security: 4; Read security: 5

Displays the port number.

MODULES (E1/PRA-1) > TEST > LOC LB

Write security: 4; Read security: 5

Causes loopback on near-end (local) port (see Figure 10). The following options are available:

NONE	No loopback active
LINE	Metallic loopback

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