| In force components  | 
Number
  | 
Title | 
Status | 
G.957 (03/06)     | 
Optical interfaces for equipments and systems relating to the synchronous digital hierarchy
		 
 | 
In force 
  | 
     | 
| Superseded and Withdrawn components  | 
Number
  | 
Title | 
Status | 
G.957 (12/90)     | 
Optical interfaces for equipments and systems relating to the synchronous digital hierarchy
		 
 | 
Superseded 
  | 
G.957 (03/93)     | 
Optical interfaces for equipments and systems relating to the synchronous digital hierarchy
		 
 | 
Superseded 
  | 
G.957 (07/95)     | 
Optical interfaces for equipments and systems relating to the synchronous digital hierarchy
		 
 | 
Superseded 
  | 
G.957 (07/99)     | 
Optical interfaces for equipments and systems relating to the synchronous digital hierarchy
		 
 | 
Superseded 
  | 
G.957 (1999) Amendment 1 (12/03)     | 
		  
 | 
Superseded 
  | 
G.957 (1999) Amendment 2 (01/05)     | 
		  
 | 
Superseded 
  |