Thompson, Richard A.
Telephone switching systems - Boston, Mass. : Artech House, 2000 - 859
1558053088
TELEPHONE SWITCHING SYSTEMS, ELECTRONIC
TK6397 / T465T
Telephone switching systems - Boston, Mass. : Artech House, 2000 - 859
1558053088
TELEPHONE SWITCHING SYSTEMS, ELECTRONIC
TK6397 / T465T