Nortel Communication Server 1000S Installation And Configuration Manual page 287

ISL hardware installation (dedicated mode)
Use Procedure 37 to install hardware for an ISDN Signaling Link (ISL) in
dedicated mode using dedicated leased lines. For shared mode, hardware
installation is identical to the PRI installation found in "1.5 Mb PRI
implementation" on
Trunks or both.
The NTAK02 connects to a modem via the NTAK19BA four-port cable.
Only ports 1 and 3 are available for use as DCHIs.
Procedure 37
Installing ISL hardware
1 Set option switches/jumpers on the NTAK02 card as shown in Table 82
and Table 83 on
DTE or DCE.)
Table 82
NTAK02 switch setting
Port 0
SDI
SDI
—
Port 2
SDI
SDI
—
ISDN Primary Rate Interface
1.5 Mb ISL implementation
page 239, with the addition of analog or digital TIE
page 288 for mode of operation (RS232 or RS422 and
Port 1 SW 1-1
DCH OFF
DPNSS OFF
ESDI ON
Port 3 SW 1-3
DCH OFF
DPNSS OFF
ESDI ON
Page 287 of 394
SW 1-2
OFF
ON
ON
SW 1-4
OFF
ON
ON
Installation and Configuration