ascom
Ascotel 2025/2045/2065
8.18
Technical Data
HBT_20321104_08/B0_en
6.5
User-network Interfaces
The following technical data applies to the user-network interfaces:
Digital User-network Interface AD2
• Proprietary interface, two-wire
• 2 system terminals per interface
• Power supply min. 75 mA, limiting at approx. 80 mA, terminal voltage
36...41 V
• Line termination in the terminal
• Transparent transmission of 2 PCM channels
Digital User-network Interface S
• Standard Euro ISDN interface
• Phantom power supply min. 140 mA, limiting at approx. 170 mA,
terminal voltage 36...41
V
Analogue User-network Interface a/b
• Voice path with A/D and D/A conversion (standard PCM, A-law)
• Transmission as per ES 201 168 (level country-specific)
• Constant current loop supply approx. 25 mA (with loop resistances
£
1000
W
)
• No-load voltage, interface 37...40 V
• Receive pulse or DTMF dialling
• Ringing supply 40...43 V 50 Hz at load 4 k
W
; no DC voltage overlay
(country-
specific versions also with 25 Hz)
• No control key detection
• No charge signalling pulses
Содержание Ascotel 2025
Страница 1: ...Ascotel ISDN telecommunications system from ascom Ascotel 2025 2045 2065 System Manual...
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