Specifications
Chapter 6 TR-08 Option
6-5
NORTEL DMS 500 DEPLOYMENT
Nortel DMS 500 CO switches do not provide the option to set all TR-08 units as A shelves (as
with the Lucent 5ESS), but must use the standard A, B, C, and D shelf assignments. This
implies alarm reporting to and from the LDS is handled only over the A link to the A shelf RT.
For four shelf deployments, always use the shelf A setting on the RT connected to the A
link, and the shelf B/C/D setting for units connected on their respective B, C, and D links.
This is depicted in Figure 7-3 below.
Switch 4 Setting
OFF=A Shelf, ON=B/C/D Shelf
OFF
ON
Access Bank
Shelf "A"
Nortel DMS 500 CO switch
DOES NOT allow each TR-08 shelf
to be configured as “Shelf A”.
DSX
Cross-Connect
Frame
SMS
Frame
T1 Test Set
DMS 500
CO Switch
Maintenance
Port
TR-08
Line
Side
Port
ON
ON
Access Bank
Shelf "B"
Access Bank
Shelf "C"
Access Bank
Shelf "D"
Configure as Shelf A
Configure as Shelf B/C/D
Configure as Shelf B/C/D
Configure as Shelf B/C/D
Figure 7-3: Access Bank I TR-08 Implementation from the DMS 500 Switch
If shelf A is deployed from the Nortel switch without shelves B, C, or D being present, the DMS
500 will detect their absence on the B/C/D links and generate a major alarm over the A link to
the remote A shelf RT unit, which is not desired. To prevent this, for less than four shelf
deployments, always use the shelf A setting on the RT connected to the A link. Any
unused B, C, or D links from the switch must be physically looped back at the Nortel DMS
500 switch. This is depicted in Figure 7-4 below for the case of a single shelf implementation.
Switch 4 Setting
OFF=A Shelf, ON=B/C/D Shelf
OFF
RT not Present
Access Bank
Shelf "A"
Nortel DMS 500 CO switch
DOES NOT allow each TR-08 shelf
to be configured as “Shelf A”.
DSX
Cross-Connect
Frame
SMS
Frame
T1 Test Set
DMS 500
CO Switch
Maintenance
Port
TR-08
Line
Side
Port
Unassigned switch ports
typically used for B, C,
and D shelves must be
placed in loopback to
prevent major alarming
to shelf A over the A link.
RT not Present
RT not Present
Configure as Shelf A
Figure 7-4: Single Shelf Access Bank I TR-08 Implementation from the DMS 500 Switch