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Maintenance Object Repair Procedures
555-233-123 10-806 Issue 4 May 2002
Expansion Interface Packet Interface Test (#589)
This test attempts to send a data packet from the TN778 Packet Control circuit
pack through any intervening Expansion Interface circuit packs and through the
Expansion Interface circuit pack to be tested. The path the data packet takes is
dependent on the location of the Expansion Interface circuit pack to be tested and
whether the Expansion Interface circuit pack is par of the Active link or Standby
link.
If the Expansion Interface circuit pack to be tested is part of an Active link from
PPN to either EPN, the path shown in Figure 10-31 is used.
If the Expansion Interface circuit pack to be tested is on either EPN and is part of
a Standby link from PPN to either EPN, the path shown in Figure 10-32 is used.
The path in this figure is also used if the Expansion Interface circuit pack to be
tested is on the PPN.
If the Expansion Interface circuit pack to be tested is part of a link from EPN to
EPN, the path shown in Figure 10-33 is used.
Figure 10-30. (Active EXP-INTFs on EPNs Only)
Figure 10-31. (Standby EXP-INTFs on EPNs or PPN EXP-INTFs Only)
EXP-INTF EXP-INTF
Packet Bus (PPN) Packet Bus (PN X)
PKT-
ACTIVE LINK
CTRL
LAPD
ENDPT
PKT-
CTRL
EXP-INTF EXP-INTF
Packet Bus (PPN)
Packet Bus (PN X)