Nortel Networks OPTera Metro 3500 - Manual (Page 340)

3-112 Hardware feature descriptions
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
For more information, refer to:
• DSM DS1x84 interface specifications on page 4-33 in Part 2 of this guide
• OC-3x4 optical interface specifications on page 4-10 in Part 2 of this
guide
Note 1: The NTN313AC circuit pack comes with LC connectors
pre-installed.
Note 2: If you are ordering the NTN313AA circuit pack, you must also
order the required optical connector kit (see
Optical connector kits on page
8-18 ).
See Table 3-3 on page 3-6 for operational temperature ranges.
Protection switching
DSM DS1x84 termination module protection switching is 1+1 non-revertive.
If a working DSM DS1x84 TM becomes defective, the traffic is switched to
the protection DSM DS1x84 TM. Switching can also take place under user
control.
Alarm LED definitions
The following table provides a list of LEDs of the DSM DS1x84 TM.
LED Name LED Color ON condition description
Status Status Red Circuit pack is failed
Active Active Green Circuit pack is IS and ACT, OC3 facility and at
least one DS1 facility are IS or OOS-AU and cross
connected.
LOS LOS Yellow Loss of Signal on the OC3 facility.
Sync Ref Fail Yellow Loss of synchronization reference signal (own
line).
OAM fail Yellow OAM link to SPx failed.