madhuvarsha
2010-07-19, 11:04 PM
ITU-T G.825 (http://m2vtelecom.blogspot.com/2010/07/itu-t-g825.html)
The scope of this ITU-T Recommendation is to define the parameters and the relevant values that are able to control satisfactorily the amount of jitter (http://en.wikipedia.org/wiki/Jitter) and wander present at the SDH network-network interfaces (NNI (http://en.wikipedia.org/wiki/NNI)).
SDH network interfaces, to which this ITU-T Recommendation is applicable, are defined in terms of bit rates and frame structures in ITU-T Recommendation G.707 (http://en.wikipedia.org/wiki/Synchronous_optical_networking); their electrical characteristics are described in ITU-T Recommendation G.703 (http://en.wikipedia.org/wiki/G.703) and the optical characteristics in ITU-T Recommendations G.957 and G.691.
Additional information (http://en.wikipedia.org/wiki/Information) regarding the architecture of SDH networks is found in ITU-T Recommendation G.803.
Jitter and wander requirements for PDH (http://en.wikipedia.org/wiki/Plesiochronous_Digital_Hierarchy) and synchronization networks are specified in ITU-T Recommendation G.823, for networks based on the first level bit rate (http://en.wikipedia.org/wiki/Bit_rate) of 2048 kbit/s, and in ITU-T
Recommendation G.824 for networks based on the first-level bit rate of 1544 kbit/s.
The jitter and wander control philosophy (http://en.wikipedia.org/wiki/Philosophy) is based on the need:
–- to recommend a maximum network limit that should not be exceeded at any relevant
interface;
– -to recommend a consistent framework for the specification of individual digital (http://en.wikipedia.org/wiki/Digital) equipment
(i.e. jitter and wander transfer, tolerance and generation requirements);
–- to provide sufficient information and guidelines for organizations to measure and study jitter
and wander accumulation in any network configuration.
The scope of this ITU-T Recommendation is to define the parameters and the relevant values that are able to control satisfactorily the amount of jitter (http://en.wikipedia.org/wiki/Jitter) and wander present at the SDH network-network interfaces (NNI (http://en.wikipedia.org/wiki/NNI)).
SDH network interfaces, to which this ITU-T Recommendation is applicable, are defined in terms of bit rates and frame structures in ITU-T Recommendation G.707 (http://en.wikipedia.org/wiki/Synchronous_optical_networking); their electrical characteristics are described in ITU-T Recommendation G.703 (http://en.wikipedia.org/wiki/G.703) and the optical characteristics in ITU-T Recommendations G.957 and G.691.
Additional information (http://en.wikipedia.org/wiki/Information) regarding the architecture of SDH networks is found in ITU-T Recommendation G.803.
Jitter and wander requirements for PDH (http://en.wikipedia.org/wiki/Plesiochronous_Digital_Hierarchy) and synchronization networks are specified in ITU-T Recommendation G.823, for networks based on the first level bit rate (http://en.wikipedia.org/wiki/Bit_rate) of 2048 kbit/s, and in ITU-T
Recommendation G.824 for networks based on the first-level bit rate of 1544 kbit/s.
The jitter and wander control philosophy (http://en.wikipedia.org/wiki/Philosophy) is based on the need:
–- to recommend a maximum network limit that should not be exceeded at any relevant
interface;
– -to recommend a consistent framework for the specification of individual digital (http://en.wikipedia.org/wiki/Digital) equipment
(i.e. jitter and wander transfer, tolerance and generation requirements);
–- to provide sufficient information and guidelines for organizations to measure and study jitter
and wander accumulation in any network configuration.