Filter
Top Products
ISDN
Program *42 – Clock Source
7-8 Strata DK Programming 5/99
Program *42 – Clock Source
Processor Type:
DK40i, All RCTUs (Release 4.0 or higher). For Release 3.1 and earlier programming,
see below.
Program Type:
System, T1, PRI, BRI
Initialized Default:
Blank
Program *42 Series Overview
This program assigns the T1, PRI or BRI interface RPTU PCB as a Primary or Secondary timing
source. The DK424 is synchronized to the Public Network. If the Primary synchronization is lost,
it switches to the secondary timing source.
When a T1 or PRI slot number is assigned, the DK424 only accepts a “1” for the circuit number.
The circuit number is only used for BRI interfaces to specify which circuit is to be used for the
Clock Source. If the PCB in this slot is not a T1 or ISDN PCB, the system will not accept data and
any entries will be cleared.
BRI interfaces should be used as a clock source only when a T1 or PRI interface is not equipped
Set T1 parameters and assignments with the Program 41 (Part 1) and 42 (Part 2) series. See the
Strata DK Installation and Maintenance Manual for additional T1 information. RDTU/RPTU
support is as follows:
For proper T1 or ISDN operation, the equipment at each end of a digital T1 span line must be
synchronized. The DK424 is synchronized (as slave) to the equipment on the other end of the
digital line by the RDTU/RPTU, RBUU/RBUS PCB designated as the Primary Reference in
Program 42-1.
If a malfunction occurs and Primary Synchronization is lost, the DK424 automatically switches
modes and synchronizes to the equipment connected to the secondary PCB designated as the
Secondary Reference. If the equipment on the other end of the DK424 digital lines should
synchronize to the DK424 clock source, then enter blanks in Program 42-1 and 2. In this case, the
DK424 clock runs free and is considered the Master Synchronization source.
Clock Source Slot Number Circuit No.
Primary
Secondary
Processor
Number of RDTU/
RPTU’s Supported
Number of RBUU/
RBUS’s Supported
RCTUA 0 4
RCTUBA/BB 2 8
RCTUC/D 6 14
RCTUE/F 8 20
Circuit NumberSEL = 1 or 2
1 - Primary Source
2 - Secondary Source
PRIMARY = or SECONDARY =
Slot Number (Release 4.0 entry. Not used
for release 3.1 or earlier versions.)