Telos TWOx12 - ISDN Worldwide (Outside the USA & Canada): the S;T Interface

TELOS TWOX12 USER’S MANUAL
INSTALLATION
CHAPTER 2 22
ISDN Worldwide (outside the USA & Canada): The S/T Interface
The Telos TWOx12 connects to the NT1 at one of its terminal jacks. The NT1 is sometimes
generically called a NCTE (Network Channel Terminating Equipment) or, in some
countries an NTBA. Use only an 8-conductor RJ-45 style cable. Unshielded twisted pair
category 3 (or higher) cable should be used. The cable details are shown below:
w
IMPORTANT!
Your ISDN connections are in the first 3 Interface slots from the left as viewed from
the rear of the unit (slots A, B, & C). The 8 pin RJ- 45 style connectors to the right side
(slot F) are for the Desktop Directors.
TA
TWO S/T ISDN Interface
NT1
(NTBA)
S Top (1/2)
RJ-45
T
o Telco
TA
NT1
(NTBA)
T
o Telco
S Bot (1/2)
RJ-45
The usual set-up outside the USA & Canada. The S/T jack is connected to the
NT1 (or NTBA) provided by the telephone authority.