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 on e step further
by checking the communication path from the p rocessor from the processor,
through the TDM/Packet Bus and DS1/UDS1 Interface circuit p ack, and on to the
far-end switch or terminal ad apter. A special ISDN message is sent to the far-end
switch or terminal adap ter, which must respond within a sp ecified amount of
time. This test is designed to ensure that the c ommunication path bet ween the
switch and the far-end is u p and operational, and that the two endpoints can
properly exchange ISDN c ontrol messages.
Figure 9-52. Remote Layer 3 Query (Test #637)
Figur e 9-52 illustrates a UDS1 Interface Circuit Pack located in the PPN. When
the UDS1 board is located in an EPN, there is addi tional Port Network
Connectivity hardware connec ting the packet b usses of the PPN and EPN.
Examples of such hardware are the Center Stage Switch and fiber-optic c ables.
PKTINT
PACKET
BUS
UDS1
TN464C/D
TO FAR-END
(TN1655)
PROCESSOR
CIRCUIT
PACK CIRCUIT
PACK
PROCESSOR
(UN331)
INTERFACE