T1
Flowchart Symbols
8-22
Strata DK I&M 6/00
Flowchart 8-3
Synchronization Slip Problems
No
1681
Is
there more
than one RDTU
installed
?
No
Slip problems cause
periodic clicking on the
talk path. Clicks can occur
many times (severe case)
during a call or only a few
times during a 24-hour
period.
Slips occur when
synchronization timing is
lost for an instant and then
recovers.
Monitor slips using
“T1ERR” function in
DK280 remote
maintenance DUMP
mode.
One example of a slip fault
when using more than one
RDTU T1 span is provided
in Figure 8-6.
• If RDTU spans are connected to a Telco
or...
long distance provider, program the rst
RDTU as the primary reference and the
second as a secondary reference using
Program
*
42 (see Figure 6-7).
• If a third RDTU is connected to a PBX,
the PBX should be set up as a slave to
the RDTU.
• If all RDTUs are connected to a PBX,
then either the RDTUs can be set as
primary and secondary references
(slaves) and the PBX as the master
(Program *42 data is blank; or, all
RDTUs should be set as the master and
the PBX T1s should be slaves.
Program as required.
•
If RDTU is connected to a reliable
clock source (Telco, AT&T etc.)
then it should be programmed as a
slave (primary reference) to the
provider. (Program *42 – data = 1).
• If RDTU is connected to a PBX or
channel bank, make sure that
RDTU is programmed as the
master clock provider (Program *42
– data = blank); or, if the PBX is set
up as a master, the RDTU should
be programmed as a primary
reference.
Program as required.
Yes
1
Is slip
problem cleared
?
No
Is slip
problem cleared
?
No
Yes
2
Start
End
Use Program
*
42 and assign a different RDTU as Primary reference.
If problem continues try another RDTU as Primary reference.
Change the RDTU that was
causing slip problems when it
was set-up as Primary reference.
Is slip
problem cleared
?
No
Yes
Go to
3
• Check all cable connections and
correct as necessary.
• Change CSU.
• Change Primary reference RDTU.
• If problem continues after RDTU is
changed, change RCTU.
• If problem continues after CSU, RDTU,
and RCTU are changed, contact the T1
provider and request a point-to-point
slip test from NIU to far end T1.
3
Is slip
problem cleared
?
Yes
Contact your
technical support
group.
End
Summary of Contents for Strata AirLink DK40i
Page 22: ...Introduction Related Documents Media xx Strata DK I M 6 00 ...
Page 48: ...DK14 Installation DK14 Wiring Diagrams 1 26 Strata DK I M 6 00 ...
Page 220: ...DK424 Installation Remote Cabinet Installation Instructions 5 68 Strata DK I M 6 00 ...
Page 262: ...DK424i Configuration Primary Reserve Power Cabinet Hardware 6 42 Strata DK I M 6 00 ...
Page 450: ...Universal Slot PCB Wiring Option Interface PCB Wiring Diagrams 10 42 Strata DK I M 6 00 ...
Page 592: ...Peripheral Installation Enhanced 911 Service E911 12 84 Strata DK I M 6 00 ...
Page 616: ...ACD Installation Spectrum Electronic Wall Boards 13 24 Strata DK I M 6 00 ...
Page 634: ...Fault Finding Fault Isolation Flowcharts 14 18 Strata DK I M 6 00 ...
Page 704: ...ISDN Interfaces ISDN Disconnect Cause Code 16 54 Strata DK I M 6 00 ...
