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ADR 3

Channel Loop Back

Bit

Description

Name

CR3B[0-4]

0-4

The addressed timeslot (1..31) is looped back to the system

interface.

Idle channel code content of control register D for this channel

is sent to remote end.

Code “00000” deactivates loop-back.

CR3B5

A “1” disables loop back of selected channel

CR3B6

Select single frame delay mode

Signal delay set to max. one frame length., if this bit is at “1”.

CR3B7

Alarm Interrupt Acknowledge

A “1” clears AINT. Resetting is not necessary.

ADR 4

Service Word

Bit

Description

Name

CR4B[0-4]

0-4

Y (Sn) bits for national use

These bits are inserted in the service word, if S

n-bit stack mode

is disabled and no TS0 transparent mode is enabled.

CR4B5

Send Remote Alarm to Remote End

A “1” causes bit 3 of service word to be set to “1”.

It is ignored if TS0 transparent mode is enabled.

CR4B6

Synchronization bit, internally set to “1”. It cannot be overwritten.

CR4B7

First bit of service word if double-frame format enabled,

and Non-transparent or Extended TS0 Signalling Transparent

modes enabled.

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