International Telecommunication Union   ITU
Français  Español
Site map Contact us Print version
  Home : ITU-T : Publications : Recommendations : Q Series : Q.140
Recently posted -  Search Recommendations
Q.140-Q.180 : Specifications of Signalling System No. 5

Recommendation Q.140-Q.180

In force components
Title Status
Q.140-Q.180 (11/88)
Specifications of Signalling System No. 5  
Initially published in Blue Book Fascicle VI.2 (1988). Available now in electronic format only. This set includes the amendments introduced on 12 March 1993 on Q.141 and Q.144
In force


Top -  Feedback -  Contact us -  Copyright © ITU 2008 All Rights Reserved
Contact for this page :  ITU-T Publications
Updated : 2006/07/31