资料介绍
CID SPECIFICATION
Test Conditions
Equipment: DD-5300 Caller ID/Caller Waiting tester
Line impedance: External 270R+750//154pf
Loop current: 20mA~120mA
FSK Transmission
Mark deviation 1300Hz+/-1.5%
Space deviation 2100Hz+/-1.5%
Baud rate: 1200bps+/-12bps
Signal level: -6dBm~-38dBm
Twist:
CAS (TAS-Terminal Alerting Signal)
Frequency: Low2130+/-0.5%, High 2750+/-0.5%.
Level: -12dBV~-35dBV(ETS300 778)/-4dBV~-40dBV for CCA
Twist:
Duration: 90ms~110ms for DT-AS; 200ms~300ms for RP-AS; 75ms~85ms for CLICW
ASA (Subscriber Alerting Signal)
Frequency 450Hz+/-25Hz
Twist: Fixed 6dB
Noise
Frequency: 300Hz~3400Hz
Level: Not exceeding a level 20dB below the level of the CDS tones
1) Data transmission prior to ringing (BT STANDARD SET)
Ringer Pattern
1> 400ms On 200ms Off 400ms On 2000
我要上传