In force components 
Number

Title 
Status 
Q.50 (07/01) 
Signalling between Circuit Multiplication Equipment (CME) and International Switching Centres (ISC)

In force

Q.50 (2001) Erratum 1 (08/06) 

In force


Superseded and Withdrawn components 
Number

Title 
Status 
Q.50 (11/88) 
Signalling between circuit multiplication equipments (CME) and international switching centres (ISC)

Superseded

Q.50 (03/93) 
Signalling between circuit multiplication equipments (CME) and international switching centres (ISC)

Superseded

Q.50 (06/97) 
Signalling between circuit multiplication equipments (CME) and international switching centres (ISC)

Superseded
