ITU-T-Q.500 Digital Local, Combined, Tranist & International Exchanges,& Field of Application

ITU-T-Q.500 - 1988 EDITION - CURRENT



Digital Local, Combined, Tranist & International Exchanges,& Field of Application


ORDER



Document Number

ITU-T-Q.500

Revision Level

1988 EDITION

Status

Current

Publication Date

Nov. 12, 1999