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Interfaces
A3.1 ISDN and analogue telephone interfaces
A3.1.1 S
0
interface
This interface supports two B channels in ISDN networks with EURO ISDN
(DSS-1) Protocol.
A3.1.2 POTS
1
interface
This interface is used for the connection to a analogue telephone line. A cable
set for phone jacks is included in the delivery.
TAB. 5 PIN ASSIGNMENT: S
0
INTERFACE (LINE ISDN)
Socket: Western (8-pole) RJ45
Pin Signal Electrical characteristics
1 not used Recommendation: I.430
Data rate: B channel: 2x64 kbit/s
D channel: 16 kbit/s
2not used
3 TX a Data out a
4 RX a Data in a
5 RX b Data in b
6 TX b Data out b
7not used
8not used
1
POTS = Plain Old Telephone Service
TAB. 6 PIN ASSIGNMENT: ANALOGUE POTS TELEPHONE INTERFACE (LINE
POTS)
Socket: Western (6-pole) RJ12
Pin Signal Electrical characteristics
1 not used Typical characteristics:
Bandwidth: 300 - 3.3 kHz
Signal to noise ratio: 45 dB
Average level: -9 dBm (275 mV)
Impedance: 600 ohms
DC voltage: 48 V (±6 V typ)
DC current: 20-26 mA (typ)
Ringing voltage 90 Vrms
Ringing frequency: 20 Hz (2 Sec. on, 4 Seek. off)
2not used
3 TEL LINE a
4 TEL LINE b
5not used
6not used
1
8
16
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