1. Electronic switching: digital central office systems of the world
Author: edited by Amos E. Joel Jr
Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)
Subject: Addresses, essays, lectures ، Telephone switching systems, Electronic
Classification :
TK
6397
.
E364
1982
2. Transmission
Author: Clement, M. A
Library: Central Library of Amirkabir University of Technology (Tehran)
Subject: Telephone - Addresses, essays, lectures
Classification :
TK
6161
.
C53
