Nortel Communication Server 1000S Installation And Configuration Manual page 261

The system response is:
DCH N EST OPER
This means that the D-channel is established and operational.
Procedure 32
Enabling the NTAK09 DTI/PRI card
Note: The DCHI and PRI cards must be configured prior to software
enabling the NTAK09. Refer to the procedure "Implementing basic PRI"
on page 262 for further information.
1 Enter the following command in LD 60 to software enable all NTAK09
DTI/PRI cards:
ENLL C
where C is the DTI/PRI card number (DLOP). The card number
associated with a DTI/PRI card is based on the slot in which the card is
installed.
Under normal conditions, this step enables the clock controller and
D-channel interface. If enable fails, enter the following command in LD 60
to software enable clock tracking on the primary digital card:
ENL CC 0
2 Enter the following command in LD 96 to software enable the NTAK93
(DCHI) daughterboard:
ENL DCHI N
where N is the DCHI I/O address.
3 Within about 30 seconds, the D-channel layer 3 should be established. To
confirm, enter the following command in LD 60 to request the current
status of the D-channel:
STAT DCH (N)
The system response is:
DCH N EST OPER
ISDN Primary Rate Interface
1.5 Mb PRI implementation
End of Procedure
Installation and Configuration
Page 261 of 394