Raven 40710D-600, Руководство пользователя

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CHAPTER 1 INTRODUCTION
System Description
The 40710D-600 Switched Network Interface System includes a 41675
Switched Network Interface module, which provides the interface between
a 4-wire service channel and a 2-wire subscriber line or a loop start PABX. A
41632 DTMF Address Decoder monitors the 4-wire input of the 41675 module
for DTMF and sets the 41675 module to the off-hook condition when the
correct DTMF code is detected.
41675 Switched Network Interface
The Raven 41675 Switched Network Interface provides ring detection and
loop current sink to interface to a 2-wire subscriber line or PBX system. The
41675 module has a 4-wire to 2-wire hybrid circuit as well as amplifiers to
provide isolation and level matching. Line Build Out (LBO) is available on the
rear panel to assist in hybrid balance adjustment, if required.
In normal operation, the 41675 module is reset by a momentary loss of loop or
by a DTMF “#” (All Clear Code). Should these fail to reset the 41675 module,
a VOX controlled time-out circuit will prevent the module from holding the 2-
wire line in the off-hook condition indefinitely. The VOX circuit monitors the 4
Wire (4W) Receive (RCV) port, and if no Voice Frequency (VF) energy is
detected for the user-programmed time period, the module is reset to the
on-hook condition.
FCC Part 68 Information
This equipment complies with Part 68 of the FCC Rules. The FCC Part 68 Label
is located on the component side of the module printed circuit board. This
label contains the FCC Registration Number and Ringer Equivalence Number
(REN) for this equipment. If requested, this information must be provided to
your telephone company.
The REN is useful to determine the quantity of devices you may connect to
your telephone line and still have all of those devices ring when your
telephone number is called. In most, but not all areas, the sum of the RENs of
all devices connected to one line should not exceed five (5.0).
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