TY  - BOOK
AU  - Swale,Richard
ED  - Institution of Electrical Engineers.
ED  - BTexact Technologies.
TI  - Voice over IP: systems and solutions 
T2  - BT Exact communications technology series
SN  - 0852960247
U1  - 621.385 21
PY  - 2001///
CY  - London
PB  - Institution of Electrical Engineers
KW  - Internet telephony
N1  - Includes bibliographical references and index
ER  -