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Program *42-1 – Primary Timing Reference Assignments (Release 3.1 and earlier)
Strata DK Programming 5/99 7-9
ISDN
Program *42-1 – Primary Timing Reference
Assignments (Release 3.1 and earlier)
Initialized Default:
Primary = 1, Secondary = 2
Program *42-1 Overview (Release 3.1 and earlier)
Assign the Primary Timing Reference with this program.
Note RDTU No.1 is the RDTU PCB installed in the lowest slot number of all RDTU PCBs,
RDTU No. 2 is the RDTU PCB installed in the next highest slot number of all RDTUs and
so on.
Primary/Back-Up Assignments Example
Note A second RBOC T1 span line can also be used as the secondary clock source.
DK424 Master (free run) Assignment Example
Program *42-2 Overview (Release 3.1 and earlier)
Assign the Secondary (Backup) Timing Reference with this program.
Note To assign RDTUs as the Master Clock Reference (free run), leave Programs 42-1 and
42-2 blank. Press button/LED 01 to enter blanks.
Select RDTU PCB Number
Primary
Secondary
SEL = 1 or 2
1 - Primary Source
2 - Secondary Source
RDTU PCB Number (1~8)
Enter the RDTU PCB number that is connected to the
primary reference T1 (span line) clock source.
Press LED Button 01 (blank) if the DK424 T1 is the
master (free run) clock source.
1863
RDTU in
Slot 13
RDTU in
Slot 25
T1 – Primary PCB
T1 – Secondary PCB
Central Office
RBOC CO lines
AT&T or MCI
Long Distance Lines
Span Line
(Primary clock source)
Span Line
(Secondary clock source)
DK424
Program Data
4 2 - 1 1 >
Program Data
4 2 - 2 2 >
Slot 13 T1 – PCB
Other DK424
or PBX, etc
Span Line
(DK424 clock source)
DK424
Program Data = blank button (Button 01)
for
4 2 - 1 and 4 2 - 2
1864