Lucent Technologies DDM-2000 OC-3 User Manual

363-206-285
Technical Specifications
10-52 Issue 3 June 2001
SONET Overhead Bytes 10
The DDM-2000 OC-3 Multiplexer currently uses the K2 byte in the SONET format
for synchronization signaling. The reserved V4 byte in the VT1.5 superframe is
used for internal fault detection in a DDM-2000 OC-3 Multiplexer shelf. This
internal usage of the V4 byte may cause the value of the transmitted V4 byte to
vary.
The DDM-2000 OC-3 Multiplexer does not depend on, and always ignores, the
value of the V4 byte received from another DDM-2000 or other shelf with an OC-3
interface.
Performance 10
Wander/Jitter 10
■ The OC-3 interface accommodates at least 10 microseconds of wander per
24-hour period without buffer overflow or depletion.
■ For SONET optical interfaces, the maximum time interval error (MTIE)
does not exceed 60 nanoseconds phase variation when timed with a
wander-free reference
■ Jitter transfer, tolerance, and generation requirements are met as specified
in TR-253 and TR-499
■ The SONET interfaces meet the T1.101 OC-N output short-term stability
mask.
Signal Performance 10
The following specifications apply given the standard networks defined in TR-499,
Issue 5.
■ For systems interfacing at the DS1 rate, the number of errored seconds,
during a 2-hour, one-way loopback test, is less than 10.
■ For systems interfacing at the DS3 rate, the number of errored seconds,
during a 2-hour, one-way loopback test, is less than 72.
■ The BER is less than 10
-9
for both the DS1 and DS3 rates. Burst-errored
seconds are excluded.
■ The frequency of burst-errored seconds, other than those caused by
protection switching induced by hard equipment failures, averages less
than 4 per day.

Lucent Technologies DDM-2000 OC-3 Specifications

General

Brand	Lucent Technologies
Model	DDM-2000 OC-3
Category	Multiplexer
Language	English