INSTALLATION AND MAINTENANCE MANUAL
LYNX
E1 FAMILY
LICENSED & SPREAD SPECTRUM RADIOS
JUNE 2001
PAGE 3-74
SECTION 3: INSTALLATION & ADJUSTMENTS
3.14 Additional Connections
There are additional customer connections which are optional and are
not required
to make the
Lynx
operational but may prove useful.
3.14.1
Orderwire Connection and Address Selection
Orderwire is a “telephone” type wayside service which allows users of the
Lynx
radio to establish
voice communications from one radio to another, either directly to the companion far-end, or through
a repeater configuration, or several repeater configurations.
Telephone connection specifications:
REN (Ringer Equivalency Number)
1.0 B
DTMF tones
within ±1.5% of nominal freq.
Ringing Voltage
48 VDC, typical
(Ringing voltage is adequate for modern solid state ringers,
NOT for the older mechanical type ringers)
This Orderwire service does not affect the normal radio transmission of E1 traffic. Refer to Section
2.3.5 for the telephone specifications. For simple near-end to far-end communications, follow the
steps below:
1. Using a small screwdriver, set the address of both terminals by rotating the address rotary
selection switches on the rear panel of the
Lynx
radio. The address is a two digit number (from
01 to 99). Each
Lynx
terminal in the network should have a unique address. This address acts
like a “phone number” for other users to call a particular terminal. Each
Lynx
terminal should
have a unique address.
Radio pairs (links) are shipped from the factory with addresses set to
01 or 02. Therefore, if only one pair is being used, address selection
may not be necessary. Also, in a connected spur network, it may be
desirable to maintain orderwire telephone addresses between 01 and 08
because the address doubles as the NMS/TBOS net address which is
limited to the addresses 01 through 08 (see Section 3.14.3 for more
information).
