Loop Back Testing; Rdtu Self Test; Network/Csu T1 Span Test - Toshiba STRATA CTX100 Installation And Maintenance Manual

T1

Loop Back Testing

Loop Back Testing
The RDTU provides three loop back test configurations. These loop back tests should be
performed as required in conjunction with CSU loop back tests (see CSU loop back test
documentation).

RDTU Self Test

This test should be performed upon initial installation of a RDTU PCB. Program the RDTU per
the Strata CTX Programming Manual; then perform the RDTU loop back test, per the instructions
in Figure
MM8976B
MITEL Chip
Notes
• P1 and P2 to On position (see
• Remove NDTU cable from RDTU amphenol connector.
• After about 12 seconds, all RDTU LEDs (except PRI/SEC SYNC) turn Off.
• Appropriate Primary or Secondary sync. LED flashes if RDTU is Primary or Secondary reference.
• If RDTU is not a Primary or Secondary reference, then the Primary and Secondary sync LEDs should
turn Off.
Figure 6-8

Network/CSU T1 Span Test

This test will verify that the far end (CSU, Network, or CPE) T1 equipment and span cabling is
functioning properly. This test checks all T1 span cabling including the RDTU Amphenol cable
and connector. Guidelines for this test are provided in
Network/CSU Check
Loop
Back
P1
On
Notes
• P1 and P2 to On position (see
• Unplug RDTU from Strata CTX back plane.
• CSU or Network T1 equipment should receive its own transmitted signal.
• Indications and results depend on CSU and/or Network equipment.
Figure 6-9
6-10
6-8, before connecting the far end (CSU, Network, or CPE) T1 span line.
RDTU Self Check
P1
P2
Figure
RDTU Self Test
P26, TT
P1, TR
P2
On
P27, RT
P2, RR
Figure
Network/CSU T1 Span Test
Remove NDTU Cable
Network
CSU
Interface
Unit
6-2).
Figure 6-9.
NDTU Cable
Network
CSU
Interface
6-2).
Network
1671
Network
Unit
Strata CTX I&M
1672
10/02