|
Work item:
|
G.664
|
|
Subject/title:
|
Optical safety procedures and requirements for optical transmission systems
|
|
Status:
|
Approved on 2012-10-29
|
|
Approval process:
|
AAP
|
|
Type of work item:
|
Recommendation
|
|
Version:
|
Rev.
|
|
Equivalent number:
|
-
|
|
Timing:
|
-
|
|
Liaison:
|
-
|
|
Supporting members:
|
-
|
|
Summary:
|
Recommendation ITU-T G.664 provides guidelines and requirements for techniques to enable optically safe working conditions (for the human eye and skin) on optical interfaces of the optical transport network, in particular, for systems employing high-power Raman amplification techniques, for equipment in restricted and controlled locations.
Due to revisions of relevant IEC requirements, the automatic laser shut-down (ALS) procedure, defined in a previous version of this Recommendation for synchronous digital hierarchy (SDH) systems, is no longer necessary and has therefore been moved to an informative appendix. Furthermore, this Recommendation provides new guidelines on automatic power reduction (APR) procedures for systems employing high-power Raman amplification techniques, including (in the latest version) Raman based GPON reach extension systems.
|
|
Comment:
|
21 September 2012: Due to the expansion of G.664 to cover access applications as well it has been provisionally agreed to modify the Recommendation title from "Optical safety procedures and requirements for optical transport systems" to "Optical safety procedures and requirements for optical transmission systems"
|
|
Reference(s):
|
|
|
Historic references:
|
|
Contact(s):
|
|
| ITU-T A.5 justification(s): |
|
|
|
|
First registration in the WP:
2012-04-16 08:39:51
|
|
Last update:
2012-11-14 13:04:14
|
