Aastra NeXspan C, Руководство по установке

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AMT/PTD/PBX/0020/2/4/EN 01/2007 Page 119
Chapter 6 - Implementation of hardware
on NeXspan 500
6.1 Interface card
LDT cards, possibly fitted with one or two ADPCM32B daughter cards are used to connect
DECT base stations to a NeXspan 500.
LDT cards have T0/S0 interfaces for managing 2- or 4-channel DECT base stations. There are
two versions of each card:
• LDTA: 8 T0/S0 interfaces
• LDTB: 16 T0/S0 interfaces
LDTA cards allow sixteen 2-channel DECT base stations to be connected, and LDTB cards eight
2-channel DECT base stations. 4-channel base stations can be connected by adding one or two
daughter cards ADPCM32B. An ADPCM32B card can manage eight 4-channel base stations.
6.2 Configuring the LDT card
6.2.1 References and equipment
Table 1: References and equipment
Note:
(1)
This cable allows to transmit DECT clock 800 ms by the distribution frame.
Note:
(2
New LDT cable to use when the synchronization signal is sent via the loop and
transmitted to the LDT cards via the back plane
Designation Reference
LDTA 16 T0/S0 interfaces for 2- or 4-channel DECT base stations HJ4758A
LDTB 8 T0/S0 interfaces for 2- or 4-channel DECT base stations HJ4758B
ADPCM32B Daughter card for managing 8 x 4-channel DECT base
stations HJ4402B
AVADQ Synchronous bus link plug (loop DECT clock recovery is not
possible with this plug) HR5124B
LDTA cable
LDTA-distribution frame link cable
(1) HG4302A
LDTB cable
LDTB-distribution frame link cable
(1) HG4302B
LDTA cable
LDTA-distribution frame link cable
(2) AHG0013A
LDTB cable
LDTB-distribution frame link cable
(2) AHG0013B