DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-950ISDN-SGR (ISDN-PRI Signaling Group)
9
Tests #639 and #636 check the health of the D-channels and DS1/UDS1
Interface Circuit Packs. As shown in Figure 9-52
, this test goes one step further
by checking the communication path from the processor from the processor,
through the TDM/Packet Bus and DS1/UDS1 Interface circuit pack, and on to the
far-end switch or terminal adapter. A special ISDN message is sent to the far-end
switch or terminal adapter, which must respond within a specified amount of
time. This test is designed to ensure that the communication path between the
switch and the far-end is up and operational, and that the two endpoints can
properly exchange ISDN control messages.
Figure 9-52. Remote Layer 3 Query (Test #637)
Figure 9-52
illustrates a UDS1 Interface Circuit Pack located in the PPN. When
the UDS1 board is located in an EPN, there is additional Port Network
Connectivity hardware connecting the packet busses of the PPN and EPN.
Examples of such hardware are the Center Stage Switch and fiber-optic cables.
PKTINT
PACKET
BUS
UDS1
TN464C/D
TO FAR-END
(TN1655)
PROCESSOR
CIRCUIT
PACK CIRCUIT
PACK
PROCESSOR
(UN331)
INTERFACE
