标题: ETSI EG 201 188 V1.1.1 (1999-06) [打印本页] 作者: t7345s 时间: 2015-1-1 19:21:44 标题: ETSI EG 201 188 V1.1.1 (1999-06)
EG 201 188 V1.1.1 (1999-06)
ETSI Guide
Public Switched Telephone Network (PSTN);
Network Termination Point (NTP) analogue interface;
Specification of physical and electrical characteristics
at a 2-wire analogue presented NTP
for short to medium length loop applications