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26 | Section 3
ISDN S-interface. ere will be 3 RJ-45 jacks. ♦
With ISDN, there are two voice channels for each physical connection, so only half as many
jacks are needed.
e line list in the LCD Telco menu will correspond to the installed module types, and your
configuration entries will vary accordingly.
Analog Phone Line Setup
When POTS lines are used, the only configuration required is to set the Country in the Telco
menu. is adjusts the Nx12 for correct impedance, loop current, and signaling. If your country
is not listed, try using CTR21 (a European standard) or USA.
ISDN Setup
Determine which physical circuit will represent each line of the system. It might help to fill out
the chart below before proceeding. Recall that each BRI has two voice channels, each of which
will appear to be a ‘line’ on the Desktop Director.
SLOT A
SPIDs (USA/Canada only) Telephone # DN/MSN
BRI 1 Line 1 ______________________ _________________________
Line 2 ______________________ _________________________
BRI 2 Line 3 ______________________ _________________________
Line 4 ______________________ _________________________
BRI 3 Line 5 ______________________ _________________________
Line 6 ______________________ _________________________
SLOT B
SPIDs (USA/Canada only) Telephone # DN/MSN
BRI 4 Line 7 ______________________ _________________________
Line 8 ______________________ _________________________
BRI 5 Line 9 ______________________ _________________________
Line 10 ______________________ _________________________
BRI 6 Line 11 ______________________ _________________________
Line 12 ______________________ _________________________
You will need to use the Web interface for ISDN configuration. e following are step-by-step
instructions. See Section 5.3 to learn how to use the Web interface. For additional information
and numerous tips on ISDN, see Sections 2.4 and 5.5.
Open your Web browser and point it to the Nx12.1.