Aastra X Series, Installation And Implementation Manual

Page: 130 / 217

AMT/PTD/TR/0020/2/7/EN 10/2008 Page 7-130
Chapter 7- Hardware implementation on
NeXspan 500
7.1 Interface card
LDT cards, possibly fitted with one or two ADPCM32B daughter cards, are used to connect
DECT base stations to 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: 16 T0/S0 interfaces
• LDTB: 8 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 DECT base station connections are set up by adding
one or two ADPCM32B daughter cards. One ADPCM32B card can support 8 x 4-channel base
stations.
7.2 Configuring the LDT card
7.2.1 References and equipment
Table1: References and equipment
Note:
(1)
This cable is used to convey the 800 ms DECT clock via the distribution frame.
Description 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