1 Scope
2
References
3
Standardized test sequences
4
Properties of pseudo-random test sequences
4.1 Measurements through scramblers
4.2 Loss of sequence synchronization
4.3 “Framed” measurements
4.4 Jitter measurements
5
Digital test sequences used in the O-Series Recommendations
5.1 511-bit pseudo-random test sequence
5.2 2047-bit pseudo-random test sequence
5.3 32 767-bit pseudo-random test sequence
5.4 1 048 575-bit pseudo-random test sequence
5.5 1 048 575-bit pseudo-random test sequence with zero
suppression
5.6 8 388 607-bit pseudo-random test sequence
5.7 536 870 911-bit pseudo-random test sequence
5.8 2 147 483 647-bit pseudo-random test sequence
6
Description of framed test sequences at different bit rates
6.1 General
6.1.1 Testing digital demultiplexers
6.2 Digital frames operating at bit rates of 1544 kbit/s
6.2.1 12 - Frame multiframe or superframe
6.2.2 24 - Frame multiframe or extended
superframe
6.3 Digital frames operating at bit rates of 2048 kbit/s
6.3.1 Frames
without CRC-4 procedure and providing common channel signalling
6.3.2 Frames without CRC-4 procedure and
providing channel associated signalling
6.3.3 Frames with CRC-4 procedure and providing
channel associated signalling
6.4 Digital frames operating at bit rates of 6312 kbit/s
6.5 Digital frames operating at bit rates of 8448 kbit/s
6.6 Digital frames operating at bit rates of 32 064 kbit/s
6.7 Digital frames
operating at bit rates of 34 368 kbit/s
6.8 Digital frames operating at bit rates of 44 736 kbit/s
6.9 Digital frames operating at bit rates of 97 728 kbit/s
6.10 Digital frames operating at bit rates of 139 264 kbit/s
6.10.1 Digital frames operating at 139 264
kbit/s and multiplexing 34 368 kbit/s signals
6.10.2 Digital frames operating at 139 264
kbit/s and multiplexing 44 736 kbit/s signals
6.11 Digital frames operating at STM-N bit rates
7
Block-oriented error performance measurements
7.1 Measurement of block errors
7.2 Block sizes
7.2.1 Block sizes for out-of-service
performance measurements on PDH systems
7.2.2 Block sizes for out-of-service
performance measurements on SDH systems
7.2.3 Block sizes for performance measurements
on cell-based systems
8
Detection and clearance of AIS and LOS defects