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APPENDIX F 151
PSTN Analogue Telephone Line Interface:
Extension 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 RJ-11 (2 wire telephone cable with BT style plug pro-
vided for use in UK)
Caller ID Support All Lines
Caller ID Alert LR+DT-AS and RP-AS
Caller ID data V.23
Distinctive Ring Support Yes
# 1: one burst per ring cycle
# 2: three bursts per ring cycle
Loop range 600 ohms
On hook/Off hook voltage 35 V
Ringing voltage 90 V rms
Ringing frequency 25 Hz
Connector type RJ-11, 2 pin
Extension Impedance BT SIN 315 for Network Impedance [UK]
ETSI TBR21 [Ireland}
Signaling type DTMF only
APPENDIX F
SPECIFICATIONS