ITU-T Q.478-1989
Signalling Procedures - Relay and Regeneration of R2 Interregister Signals by an Outgoing R2 Register in a Transit Exchange - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp

Standard No.

ITU-T Q.478-1989

Release Date

1989

Published By

International Telecommunication Union (ITU)

Status

Withdraw

Latest

ITU-T Q.478-1989

Scope

the maximum permissible time interval between the recognition of 2 successive forward multifrequency combinations; this time interval may in certain cases be influenced by the maximum

ITU-T Q.478-1989 history

• 1989 ITU-T Q.478-1989 Signalling Procedures - Relay and Regeneration of R2 Interregister Signals by an Outgoing R2 Register in a Transit Exchange - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp