E1 (ISDN) DPNSS - Reset Procedure

Use the following procedure to disable and re-enable a troublesome E1 PRI - DPNSS
(used as a tie link between PBX's from different manufactures).
Steps in RED are for Option 11 systems only, ignore these on large systems.

Note: The loop or card number and the D-channel number must be known before you start!

DDCS is the loop or card slot number (3 in this example)
DDSL is the D-channel number (4 in this example)

Disable:

Overlay	Commands	Notes
LD 75:	DIS DDSL 4	disable the D-channel (4 in this example)
	DIS DDCS 3	disable the loop or card slot (3 in this example)
LD 60:	DIS CC 0	disable the clock controller

Remove / replace card.

Note:

Set the front panel switch to Dis before removing or inserting. After inserting, wait 10 seconds, and set to Enb.
Be sure to compare dip switch settings on the old card with the new card so both cards are optioned the same.

Enable:

Overlay	Commands	Notes
LD 75:	ENL DDCS 3
	ENL DDSL 4
LD 60:	ENC CC 0
	TRCK PCK
	SSCK 0
LD 75:	STRT 4
	STAT DDSL 4	ensure Enabled Active
	STAT DDCS 3	32 uneq, 30 enable/idle

Note: The following Digital Trunk Message indicates an Enabled Active State - DTM0301 4