Aastra AXD

Installation and Maintenance Manual - Aastra 5000 AMT/PTD/PBX/0058/4/6/EN
Description des sous-ensembles 01/2011 Page 191
4.9 EXT1-S12 card
4.9.1 Functional description
The EXT1-S12 card offers the following functions:
- additional interfaces for telephone equipment:
- 8 analogue set interfaces (type LA16X),
- 4 digital set interfaces (type LN16X),
- 4 configurable ISDN interfaces:
• In T0 for connection to the network
• Or in S0 for connecting terminals or DECT base stations (with 2 channels and
4 channels if fitted with an ADPCM16V daughter card).
Note: - The integrated S0 accesses manage synchronisation by bit M frame S.
- The AXS cabinet delivers 48V remotely over an S0 link.
- Factory configuration of the EXT1S12 card: remote power supply is enabled on
interfaces 2 and 3, and disabled on interfaces 0 and 1.
- Power supply is via a backplane connector. The EXT1-S12 card receives the
following over this specific connector:
- +5 V and +3.3 V power supply voltages used for its internal circuit operations
- a - 48 V power supply voltage for analogue and digital sets,
- a 70V AC power supply voltage for the ringing current of analogue sets.
Daughter cards
• The EXT1-S12 card can receive an ADPCM16V daughter card which offers the 4-
channel base station function on the ISDN ports integrated into the card (S/T0 to S/T3).
See the description of the ADPCM16V daughter card in Section 4.13.2.2.