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IFB - IFB (Interrupt Foldback) is a special type of communication in which a listener at a particular

intercom output port normally hears an audio program source connected to a particular intercom

input port. A keypanel operator can activate a key to interrupt the audio program source and then

talk to the listener. Normal operation resumes when the keypanel operator releases the key.IFB is

typically used to cue on-the-air talent. For example, the news anchor during a news broadcast

typically listens to the broadcast audio mix in an earset (except that the news anchor's own voice

audio is removed from the mix). A director at a keypanel can interrupt the broadcast audio to the

news anchor's earset and provide new information to the news anchor. IFB could also be used with

a PA (public address) system that normally broadcasts background music. The background music

can be interrupted while someone is talking over the PA.IFB's are set up by defining the IFB inputs

and outputs using the intercom system configuration software. The intercom output port is called

the IFB output and the program input port is called the IFB input. IFBs can also be given names

which are meaningful to keypanel operators. Once an IFB has been set up and named, it can be

assigned to any keypanel key (provided that IFB assignment has not been restricted or disabled in

the intercom system configuration software). For further information about IFBs, see the AZedit

user manual.

ISO (Camera ISO) - ISO is a means for a keypanel operator to isolate a particular intercom port for private

communication. While the intercom port is isolated, it can only hear audio from the keypanel

operator. ISO is frequently used in television broadcasting to temporarily isolate a member of a

camera party line. The isolated camera operator can then receive directions without interference

from other audio traffic on the party line. ISOs are setup using the intercom system configuration

software. Each ISO can also be given a name which is meaningful to keypanel operators. Once an

ISO has been set up and named, it can be assigned to any keypanel key (provided that ISO

assignment has not been restricted or disabled in the intercom system configuration software). For

further information, see the AZedit user manual.

Matrix - Matrix is a term inherited from earlier point-to-point intercom systems, where all point-to-point

communication was accomplished by closing specific switches in a switching matrix. Examples

include the RTS CS9500, CS9600, and CS9700 Intercom Systems. In many instances, Matrix is

used interchangeably with Intercom System. RTS ADAM, ADAM CS, and Zeus Intercom

Systems, on the other hand, do not use a switching matrix, but use a method called Time Division

Multiplexing (TDM), in which communications are routed as digital packets. However, use of the

term “matrix” persists since packet routing basically accomplishes the same thing as a conventional

switching matrix: namely, connecting distinct talkers and listeners.

Party Line (PL) - A party line (also called a conference line) is a group of intercom ports which can always talk and/

or listen to each other. Party lines have default names PL01, PL02 etc. These names can be changed

to more meaningful names using Other Alpha setup in AZedit. Members are assigned to a party

line using Party Line setup in AZedit. Once a party line has been set up, it can also be assigned to a

keypanel key either from the configuration software or at a programmable keypanel. This allows

the keypanel operator to talk and/or listen to the party line without being a member.

IMPORTANT: Do not confuse special lists and party lines. A special list is used when a keypanel operator needs to

occasionally talk or listen to a group of intercom ports that are otherwise unrelated. A party line is

typically used when several users of non-keypanel devices (such as belt packs or camera intercoms) are

engaged in a specific common activity and they need to talk and/or listen to each other all the time.

Keypanels are almost never members of party lines (although they can be). However, a keypanel key

can be assigned to occasionally talk or listen to a party line if desired. Just remember: party lines are

primarily set up for party line members, with occasional access by keypanel operators, while special

lists are set up exclusively for keypanel operators to talk or listen to several unrelated intercom ports.

For specific information about party line setup, see the AZedit user manual.

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