
PCM system - Typical parameters
4 KHz Speech signal
8 KHz Sampling
8 bits / sample digitising
per speech channel 8 x 8 bits = 64 kbps
T1 carrier: 24 channels. 8 bits in 125 µs / channel
24 x 8 = 192 bits in 125 µs / frame, 1 bit per frame for sync
193 bits in 125 µs, Line rate 193/125 µsec = 1.544 Mbps
ITU ( EUROPEAN)
32 Channels 8 bits/ 125 µss / channel
32 X 8 bits / 125 µs = 2.048 Mbps
30 channels info; 2 channels management
Jamadagni H S DC/V1/2004 13
Comentarios a estos manuales