13-280121 Rev. C
Page 9
Installation
Ordering ISDN Service ________________________________________
ISDN ordering forms may be supplied by your service provider. You can also print forms using the PC-
based Configuration Wizard. Please refer to Appendix A in this manual.
Consult your service provider to plan your service installation. Allow adequate time after cutover for testing
of all call appearances and programmed features. Ask your service provider for your SPID numbers, and
confirm the installation date.
S/T Version (6220T-TSG-DD) Installation _________________________
S/T models require an external NT1, such as the Tone Commander NT1U-223TC or NT1B-300TC.
Note
: The
NT1B-300TC-TSG
model must be used if the NT1 is located inside the SCIF area.
Set the Termination Switches on the Telephone and NT1
Set the termination switches on the bottom of the telephone and on the NT1 to match the termination
impedance to your premises wiring configuration. Several typical wiring configurations are shown below,
with the appropriate switch setting.
We recommend the use of Category 3 or better unshielded twisted pair cable with T568A or T568B
connector wiring. Distances shown are the maximums for 24-gauge cable, and may vary for other cable
types.
Available switch settings are
OFF
and
100
ohms.
