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612020129L1-1 TSU 120 User Manual
B-1
Appendix B
Understanding TR-08
The TSU 120 chassis functions as a Remote Terminal in Digital Loop
Carrier and as Integrated Digital Loop Carrier Systems as described in
TR-TSY 000008. The TSU 120 supports SLC96 framing, Mode I opera-
tion, ORB-13 and ORB-16 alarm formats, alarm reporting, and user-de-
finable BPV threshold detection rate.
A basic familiarity with DLC systems, IDLC systems and TR-TSY-
000008 is assumed, but the following information will be useful:
• All received TR-TSY-000008 specific alarms are reported locally
within the history feature of the TSU 120.
•When the DISABLE ALARMS option is selected, no alarms will be
sent on the DLF, but received alarms will be reported locally in the
history.
• Other alarms normally reported by the TSU 120 will also be placed
in history.
• Each TSU 120 needs to be configured as the A SHELF, as it is provi-
sioned as a separate entity.
• All alarms will refer to A SHELF when received from TSU 120.