DS1 CONV-BD
Issue 1 May 2002
8-693555-233-143
Upgrading TN574 DS1 CONV Circuit Packs in a
Fiber-Link to TN1654s—Duplicated PNC
!
WARNING:
Do not power down a Switch Node carrier to replace a circuit pack.
!
WARNING:
In duplicated PNC configurations, one DS1 CONV complex in the fiber-link
serves as the active and the second DS1 CONV complex serves as the
standby. Each DS1 Converter complex consists of two TN574 boards or two
TN1654 boards. A TN574 cannot be combined with a TN1654 in the same
DS1 CONV complex. It is also required that all four DS1 CONV boards and
interconnecting facilities that serve an PN be of the same type. Note,
however, that TN574 and TN1654 boards can coexist within the same
system, they just cannot be in the same fiber-link.
!
WARNING:
The two DS1 CONV boards, TN1654 and TN574, use unique “Y” cables that
are incompatible with each other.
!
WARNING:
A TN573B (or higher-suffixed) board must be used when connecting a SNI
board to a TN1654 DS1 Converter board.
Table 8-268.
Upgrading TN574 DS1 CONV Circuit Packs in a fiber-link to
TN1654s—Duplicated PNC
Steps Comments
Enter status pnc Verify that the A-PNC is active. If the B-PNC is
active, enter the reset pnc interchange
command to cause the A-PNC to go active.
Enter busyout pnc-standby Fiber link cannot be removed if PNC
duplication is operational. Must busyout the
standby PNC first.
Enter change system-parameters duplication.
Change the Enable Operation of PNC
Duplication? field to n.
Disable PNC duplication.
Enter list fiber-link Determine the fiber-link number that the four
TN574 circuit packs to be upgraded are
associated with.
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