Maintenance-Object Repair Procedures
555-233-143
8-218 Issue 1 May 2002
— This test verifies the operation of a large portion of the ATM-EI circuit and
packet paths, but does not verify the optical portion of the lightwave
transceiver. If this test passes, the ATM-EI circuit pack is functioning
correctly, but faults can exist in the lightwave transceiver. If the test fails,
the fault can be on the board. After the test results are reported, the ATM
framer is taken out of loopback.
NOTE:
This test can be run on active or standby ATM-EIs, but it is not
allowed if an ATM-EI is the Expansion Archangel.
Figure 8-6. ATM Board Framer Loop-Around Test (#1260) (non-EAA, Packet Path)
Tone clock
Tone detector
PNC mode
PNC modePNC mode
ATM
framer
looped
iodfpak AWF 040699
ATM
switch
Packet bus
(PPN)
TDM bus
(EPN X)
Packet bus
(EPN X)
Packet
interface
ATM
circuit
pack
ATM
circuit
pack
ATM
circuit
pack
ATM
expansion
archangel
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