Instruction manual

• Fora voice channel with FXO interface: the detection of incoming ringing
at the voice channel interface.
• ForavoicechannelwithE&Minterface: the detection of an active M signal.
Figure 1-2. Typical DV-MUX3 Application in an Inter-LAN Link
The indication that a voice channel no longer needs the link to the remote DV-
MUX3 is derived in the following ways:
• For a voice channel with FXS interface: the detection of switching from
the off-hook to the on-hook condition. This is the normal way the communi-
cation on the voice channel is ended.
• Foravoicechannel with FXOinterface:the stopping of the incoming ring-
ing, but only if the remote subscriber did not gone off-hook in response to the
ringing. Note that if the remote subscriber has been off-hook, the ending of
communication is controlled only by the remote subscriber.
• ForavoicechannelwithE&Minterface:thedetection of aninactiveM signal.
Conditions for
Activation/Deactivation
of the Data Channel
The indication that the user’s terminal is active is derived from the state of the DTR
line in the data channel interface (the terminal is assumed to be active when its
DTR line is ON).
Conditions for
Activation of Main
Link
A DV-MUX3 will activate the main link to the other DV-MUX3 upon the detec-
tion of the first valid request for connection. The link will remain connected as long
as at least one valid request is present.
• Valid connection requests originating from a voice channel can be made by
either of the master, or the slave DV-MUX3, because the DV-MUX3 dial-up
mode is designed to operate symmetrically with respect to voice channels.
TYPICAL APPLICATIONS AND SYSTEM DESIGN CONSIDERATIONS
DV-MUX3 Installation and Operation Manual 1-9