Question 6/XV - Characteristics of automatic rerouting systems for the
restoration of transmission links (network protection switching) (New
Question)

Considering

(1) that there is a need to provide an appropriate level of redundancy
to protect a network from catastrophic events and that networks need to
be planned to incorporate automatic restoration and diversity in order
to increase the level of network availability;

(2) that various possibilities exist or may be developed to accomplish
the automatic restoration of failed network elements,

What characteristics should be recommended for automatic rerouting
systems for transmission restoration?

Points for study

1.Interworking of equipment from different manufacturers.

2.Application of Operations, Administration and Maintenance interfaces
as given in Recommendation G.771 - any unique features required.

Notes

1.The study of this Question should be coordinated with the study of:

1.1Questions 5/XV, 18/XV and 20/XV.

1.2Question 27/II (Design alternatives for telecommunication networks).

1.3 Question 9/IV (Transmission restoration).

1.4 Question 32B/II (Restoration of failed exchanges, etc.).

2. Operations, Administration and Maintenance interfaces on transmission
equipment are studied under Question 9/XV.