A P P E N D I X F
S P E C I F I C A T I O N S
PSTN Analogue Telephone Line Interface:
Line Type | Loop Start |
Line Impedance | BT SIN 315 for Terminal Impedance [UK] |
| ETSI TBR21 [Ireland] |
| (options for 600 ohms, 900 ohms and TBR 21) |
Ringing Detection | 25 Hz |
Connector Type | |
| vided for use in UK) |
Caller ID Support | All Lines |
Caller ID Alert | |
Caller ID data | V.23 |
Distinctive Ring Support | Yes |
| # 1: one burst per ring cycle |
| # 2: three bursts per ring cycle |
Extension Interface |
|
Loop range | 600 ohms |
On hook/Off hook voltage | 35 V |
Ringing voltage | 90 V rms |
Ringing frequency | 25 Hz |
Connector type | |
Extension Impedance | BT SIN 315 for Network Impedance [UK] |
| ETSI TBR21 [Ireland} |
Signaling type | DTMF only |
A P P E N D I X F | 1 5 1 |