Nortel Networks DCT1900 - Manual (Page 247)

Technical Product Manual - DCT1900
Installation Instructions, Synchronization Distribution Board (SDB) – REX-BRD0006 or ROANB 101 38
Install-DCT1900/R8/mw 18-1
© 2000-2005
C HAPTER 18
Synchronization Distribution Board (SDB) – REX-BRD0006 or ROANB
101 38
18.1 Board Description
The SDB (see Fig. 18–1) if installed is located on the bottom plate of the Modular Cabinet near the
MCCB and allows the connection of one input and three output synchronization signals to the CPU
via shielded twisted pairs cables. The synchronization signals are required to achieve PWT air
interface synchronization between systems to allow seamless inter system handovers. An
electrical schematic diagram is shown in Fig. 18–2. This board is not factory installed.
Note: Refer to Chapter 20 for CPU2 synchronization.
Fig. 18-1 Synchronization Distribution Board - REX-BRD0006 or ROANB 101 38
Connectors
X1, X2, X3
: External cable connection sync out.
X4 : External cable connection sync in.
X5, X6, X7 : Sync out connection to CPU.
X8 : Sync in connection to CPU.
X8
X7 X6 X5
SYNC
IN
SYNC
OUT 1
SYNC
OUT 2
SYNC
OUT 3
X4
X3 X2 X1
Screw holes