Telos Zephyr User Manual page 56

To Telco Line
It is also possible to use an external NT1, connecting it to the S/T jack. The internal
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Section 4
ISDN
Telephone
S/T
U
N T1
S/T
U
N T1
A set-up taking advantage of the S/T jack. ISDN permits
multiple devices to connect to this bus. Here, a second
Zephyr and an ISDN phone share the line.
HOT TIP!
We have tested and approved the ISDN telephone sets in the
ITT Cortelco family. When configured properly, they may be
powered from the Zephyr's internal supply.
IMPORTANT!
If using an external NT1, or connecting another device, be
sure to check power arrangements. The Zephyr provides "PS-
2" power on the S/T jack. If your NT1 or other device has an
external power supply it is essential that the 2 power leads not
be interconnected or damage to the Zephyr, external
equipment, or both, may occur. Contact Telos Systems
customer support for additional information, if needed.
INSTALLATION & BASIC OPERATION
Zephy r USA ISDN Interface
TA
Zephy r USA ISDN Interface
TA