Nortel SONET AccessNode Manual page 51

Procedure 2-4 (continued)
Testing DS3 or STS-1 protection switching
In this procedure, manual switching, automatic switching, and lockout from
switching require that one working and one protection DS3/STS mapper or
STS-1 interface card be provisioned. Forced switching and priority override
require that two working and one protection DS3/STS mappers or STS-1
interface cards be provisioned.
You need the following equipment to perform this procedure:
•
•
•
The optical loopbacks (NT7E47) remain connected from the previous
procedure. If you need to make the connections, see steps 1 through 5, starting
on page 2-19. The DS3/STS-1 test set remains connected at the DSX-3/STS-1
cross-connect panel as described on page 2-22.
Action
Step
1
a DS3/STS-1 transmission test set (HP 156 MTS (Cerjac), or equivalent)
two (2) coaxial cables with the proper connectors (BNC-to-BNC)
a VT100-compatible terminal, connected to the NE local craft access panel
(LCAP)
DANGER
Risk of injury or damage
Read the warnings and precautions in Chapter 1 to
minimize any risk to personnel and equipment.
Action
As shown in Figure 2-3 on page 2-34, set up the DS3/STS-1 test sets to
transmit to both DS3/STS mappers or to both STS-1 interface cards. Connect
one test set to the I/O cards for the G1 unit and the other test set to the I/O
cards for the G2 unit. Table 2-1 on page 2-3 shows DS3 or STS-1 group and
slot associations.
AccessNode Site Testing Procedures 323-3001-221 Issue 2.0
DS3 tests, STS-1 tests, and optical in-bay tests 2-33
—continued—