Published Date: 08/01/2014

Conformance tests specification for the session initiation protocol – Part 3: Abstract test suite and partial protocol implementation extra information for testing (PIXIT) proforma

$7.8

ITU-T M.729

Published Date: 11/01/1988

ORGANIZATION OF THE MAINTENANCE OF INTERNATIONAL PUBLIC SWITCHED TELEPHONE CIRCUITS USED FOR DATA TRANSMISSION

$6

ITU-T Q.825 SPANISH

Published Date: 06/01/1998

Especificaciones de aplicaciones de la red de gestión de telecomunicaciones en la interfaz Q.3: Registro de detalles de llamadas

$21.9

ITU-T D.251

Published Date: 01/01/1993

General Charging and Accounting Principles for the Basic Telephone Service Provided over the ISDN or by Interconnection between the ISDN and the Public Switched Telephone Network

$6