A P P E N D I X F 1 5 1
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
A P P E N D I X F
SP E CI F I CA T I O N S
