00331-0398 <90-00044>
P
AGE
3
The off-net package provides forced disconnect, which allows order
wire users to disconnect an unwanted call from the outside by
dialing # or * and three digits. If the unwanted caller tries to
call again, the DTSS3ON will not answer. Normal operation is
restored by pressing the # or * key again.
The 00331 Interface has three 400-type plug-in modules. The
modules include:
♦
The 44443 Term Set
♦
The 44023 PABX/Trunk Interface
♦
The 44020 DTMF Decoder (with 49018 subassembly for
3-digit dialing or 49028 subassembly for 6-digit dialing).
The modules install into a 41071 mounting, which places the
three modules horizontally in 1 3/4 inches of rack space.
The 00331 Interface operates on -21 to -56 VDC power.
NOTE:
The modules used in the DTSS3ON are registered under part
68, FCC rules. The Federal Communications Commission
requires certain precautions and procedures be followed when
connecting the DTSS3ON to the Public Switched Telephone
Network. Refer to the 44023 and 44443 module practices for
details and for the device registration numbers.
GENERAL DESCRIPTION
CIRCUIT DESCRIPTION
F
ig. 1 shows a 00331 DTSS3ON Order Wire/PABX Interface
block diagram. Functional schematics and circuit descrip-
tions of individual modules contained in the 00331 DTSS3ON
are located in the practices specific to those modules.
