Technical data

PAGE 102
Interfaces
A2.1 POTS, ISDN and LAN interfaces
A2.1.1 POTS 1 & 2 interfaces
These interfaces are used to connect the system to analogue telephone lines.
A2.1.2 S
0
interface
This interface supports two B channels in ISDN networks with the EURO
ISDN (DSS-1), the US National-1 or the Japanese ISDN Protocol.
TAB. 4 PIN ASSIGNMENT: POTS TELEPHONE INTERFACE (LINE POTS)
Socket: Western (6 pin) 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 sec off)
2not used
3 TEL LINE a
4 TEL LINE b
5not used
6not used
TAB. 5 PIN ASSIGNMENT: S
0
INTERFACE (LINE ISDN)
Socket: Western (8 pin) 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
3TX a Data out a
4RX a Data in a
5RX b Data in b
6TX b Data out b
7not used
8not used
16
1
8