Mike's PBX Cookbook

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!

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

Disable:

  1. LD 75: DIS DDSL 4
  2. LD 75: DIS DDCS 3
  3. LD 60: DIS CC 0

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:

  1. LD 75: ENL DDCS 3
  2. LD 75: ENL DDSL 4
  3. LD 60: ENC CC 0
  4. LD 60: TRCK PCK
  5. LD 60: SSCK 0
  6. LD 75: STRT 4
  7. LD 75: STAT DDSL 4 (ensure Enabled Active)
  8. LD 75: STAT DDCS 3 (32 uneq, 30 enable/idle)

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

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