TY  - BOOK
AU  - Sexton, Mike,
AU  - Reid, Andy
TI  - Transmission networking: Sonet and the synchronous digital hierarchy 
T2  - The artech house telecommunications library
SN  - 0-89006-551-9
AV  - TK5101 S49
PY  - 1992///
CY  - Boston
PB  - Artech
KW  - Sistemas de telecomunicación
ER  -