Telos Zephyr Xport User Manual

ZEPHYR 

XPORT 

USER’S GUIDE 

 

 

 

17

 

(What to do if…), or consult your Zephyr Xstream User's Manual for extensive tips 
for troubleshooting the problem. 

If you are not using the 2- wire "U" interface, you can disregard this LED. 

S INTERFACE (only active if option 1701-00135 or option 1701-00056 is present) 

This interface will only be active if you have one of the optional ISDN interfaces installed 
in your Xport. It is the usual interface for most parts of the world.  It can also be used in 
the USA and Canada if an external NT1 is provided, or to allow two Xports to share the 
same ISDN circuit, see Section 3.6 (Connecting two Xports…).  

This jack allows interfacing to the 4- wire "S" Interface provided by external Network 
Channel Termination Equipment (NCTE, NT1, NTBA).   This is an 8- position/8- pin 
miniature modular jack (RJ- 45 style) and uses pins 3- 6 to connect to the 4- wire ISDN S 
circuit.  

A twisted pair cable with 8- postion/8- pin miniature modular plugs should be used. This 
cable should comply with either the TIA/EIA- 568- A T568A or TIA/EIA- 568- A T568B 
standards for pinning. 

3.2  Audio Connections & Mixer 

See the inside rear cover for an illustration of the rear panel. Section 2.3 explains the 
mixer. Here is a block diagram of the Xport's Mixer: 

Mic.

Input

(XLR)

Line

Input

(¼" TRS)

Head-

phone

(¼")

Monitor

Mix Out

(¼" TRS)

Aux

Interface

(¼" TRS)

TO:

Omnia

Processor
& Encoder

Section

FROM:

Decoder

Section

Mix

Control

Receive

Direct Out

(XLR)