Telos Zephyr, User Manual

Page: 41 / 258

Section 3 ZEPHYR AT A
GLANCE
41
LINE LEDs
Each of these corresponds to an ISDN channel. When illuminated, indicates that the
channel is in- use.
LCD and Pushbuttons
The use of the pushbuttons and LCD are described in tutorial fashion in section 4
(Installation & Basic Operation) and in full detail in section 8 (Detailed Menu
Reference).
REAR PANEL
0
IN T E R N A L F U S E
U N I V E R S A L P O W E R IN P U T
9 0 - 26 0 V AC
O U T P U T IN P U T
P H O N E S R E M O T E P A N EL P A R A L LE L C O N T R O L
R S 2 3 2 R EM O T E
A B
ZEPH YR
T E L OS
SY S TEM S, IN C.
R E C E I VE FR OM N E TW ORK S E N D T O NE T W O R K
MIC
L IN E
-1 0
+4
D T E D I G IT A L NE T WO R K
A U D I O T R AN S CE I V E R
MAD E IN U. S . A.
A B
NT1/SET
S
U
LineDirect
Slot Positions
The Zephyr employs a modular architecture, permitting future expansion and flexibility.
There are three slots for expansion cards, each of which allow connector access through
the rear panel.
These slots accept modules which interface to the transmission path being used.
The optional AES/EBU interface may also occupy one of these slots.
ISDN
Permits connection to ISDN telephone lines. There are two types of interface, one for
the USA and another for Europe and other parts of the world. For additional
information and block diagrams see manual section 4 (Installation & Basic Operation).
The ISDN interface may have an integrated NT1, and in that case it includes both S/T
and U connections. The U connection, on the smaller jack, can go directly to a line from
a telephone central office. The S/T connection, on the larger 8- pin jack, has two
possible functions:
IMPORTANT!
As with any piece of electronic gear, it is advisable that
precautions be taken to prevent damage caused by power
surges. Standard telephone line surge protectors can be used
to offer some degree of protection at the U interface jack. It is
the user’s responsibility to ensure that adequate protection is
provided.