TELOS 2101 USER’S MANUAL
PART IV
THE STUDIO INTERFACE & ADDITIONAL HYBRIDS
IV-21
SECTION 1 – STUDIO INTERFACE INSTALLATION
ISDN S interface connector
PIN
FUNCTION
1
Not Connected
2 Not
Connected
3
S Transmit to n
4
S Receive from n
5
S Receive from network -
6
S Transmit to network -
7*
PS2 Power -
8* PS2
Power
The S interface is a standard modular RJ-45 style jack. Pin 1 will be at the top.
* Not connected on units sold outside of the US and Canada
1.4
Studio Audio Connections
w
IMPORTANT!
Unless otherwise indicated the following instructions apply to both the Series 2101 Studio
Interface and the Telos TWO dual hybrid. Additional information on the Telos TWO is
included in the manual shipped with that product.
1.4.1
Mix-Minus
What is a mix-minus?
The Telos 2101 Studio Interface (and Telos TWO hybrid) must be fed send-to-caller
audio which is free of the caller audio, a “mix-minus”. A mix-minus is a mix of all of
your audio sources which will be placed on-air (or recorded) except the incoming
caller audio–thus the “mix-minus” designation. The European term “mix minus one”
is a clearer term for the typical situation. A mix-minus is also sometimes referred to
as a “clean feed”. Most modern consoles (mixing desks) are able to handle one or
two of these, but more may be difficult. In that case it may be necessary to get
