TY  - BOOK
AU  - Froehlich, Fritz E
TI  - The Froehlich/Kent Encyclopedia of telecommunications.volume-16: Subscriber loop signaling to teletraffic theory and engineering 
SN  - 0824729145
U1  - 621.38203 
PY  - 1998///
CY  - New york
PB  - Marcel dekker
KW  - subscriber loop signalling
ER  -