Section Data Communication Channel (Sdcc); Ec-1X3 Circuit Pack - Nortel NTRN10AN Planning Manual

3-82 Hardware feature descriptions
Unidirectional path switched rings (UPSRs)
UPSRs operating at an OC-3 line rate - and employing OC-3x4 circuit packs -
require two OC-3x4 circuit packs in each shelf.

Section data communication channel (SDCC)

An OC-3 line carries a DCC channel that can be edited, provisioned, and
deprovisioned. Each OC-3x4 circuit pack carries four SDCC channels (one for
each OC-3 port).
Alarm LED definitions
The following table provides a list of LEDs of the OC-3x4 optical interface.
LED
Status
Active
LOS(1-4)

EC-1x3 circuit pack

(NTN436AA)
Release 12 supports a version of the EC-1x3 mapper specifically for the
OPTera Metro 3500 shelf.
The EC-1x3 circuit pack receives and transmits three EC-1 signals from
external equipment and provides accessibility to VT1.5s or STS-1s within the
network element. This circuit pack is fully bidirectional. The facility signal
attributes for an EC-1x3 circuit pack facility are provisionable.
OPTera Metro 3500 Multiservice Platform
Note: 1+1 line protection can be used only between OC-3 ports which
have the same port number and which are located on OC-3x4 optical
interface circuit packs installed in adjacent slots. OC-3 ports in the odd slot
act as the working line, and OC-3 ports in the even slot act as the protection
line.
Note 1: The maximum number of simultaneous SDCC-provisionable
ports on an OPTera Metro 3500 shelf is 34 (the shelf must be equipped with
eight unprotected OC-3x4 or OC-12x4 STS circuit packs in slots 3 through
10, and a protected pair of OC-48 or OC-192 circuit packs in slots 11 and
12).
Note 2: For Nortel Networks interworking and multi-vendor network
scenarios, DCC interoperability can be achieved with the appropriate
provisioning. See Optical Networks Data Communications Network
Planning Guide, NTR710AM.
Color
Red
Green
Yellow
NTRN10AN
Description
Circuit pack failure
In service and carrying traffic
Loss of signal on the port
Rel 12.1 Standard Iss 1 Apr 2004