Specifications

5
Chapter 1 Application Information
1.1 Description
The SP4 Telephone Zone Controller (SP4-TZC) controls the zone paging capability of the SAFEPATH
®
4
Multi-Function Facility Communications System. It is used in conjunction with the SP40/2 and the
SP4-APS (SP4 Addressable Paging Splitter) module. Audio Boosters SPB-80/4, SPB-160, and SPB-320
can be used in conjunction with the SP40/2. Each audio booster can use additional SP4-APS modules,
increasing the number of possible paging zones.
The Addressable Paging Splitter (SP4-APS) in conjunction with the SP4-TZC allows the End User to make
audio zone specific telephone pages and/or have audio zone specific Background Music (BGM) on a
Wheelock SAFEPATH
®
4 Multi-Function Facility Communications System. This can occur as long as
system is not broadcasting a pre-recorded message or when the live microphone is in use. The selective
paging and BGM functions are controlled by the SP4-TZC (Telephone Zone Controller) over an RS-485
based digital control network. It also provides a means for expanding one supervised audio output zone to
four CLASS “B” or two CLASS “A” supervised zones. The maximum number of CLASS “B” zones in a
system is 68. The maximum number of CLASS “A” zones in a system is 34.
The SP4-TZC can be used with or without the SP4 Telzone Programmer software. The features available
without using the software include the use of Individual Zones and Fixed Zone Groups, and Background
Music on all zones. When using the SP4 Telzone Programmer software, additional features include Logical
Zone Groups and editing Individual Zones for Background Music.
An Individual Zone is one of the separate outputs from an SP4-APS splitter. The SP4-APS splitter can
produce either 2 CLASS “A” or the 4 CLASS “B” zones.
A Fixed Zone Group consists of the 2 CLASS “A” or the 4 CLASS “B” zones on each SP4-APS splitter.
For example, if the first SP4-APS splitter is used to cover the zones in the warehouse area, the Fixed Zone
Group for that area can be paged by keying the two digit code “71” on the paging phone. The zone codes
for Fixed Zone Groups are 71 through 87 with each zone code matching the order of splitters.
When used with the SP4 Telzone Programmer software, the SP4 Telephone Zone Controller (SP4-TZC) in
conjunction with the SP4-APS splitter is capable of programming up to 9 Logical Zone Groups for audio
paging. A Logical Zone Group consists of 1 to 5 Individual Zones and/or Fixed Zone Groups. It can also
program any Individual Zone for Background Music. The two digit zone code for the Logical Zone Groups
are “91” through “99”.
Paging an Individual Zone, a Fixed Zone Group, or a Logical Zone Group is accomplished using a touch
tone phone connected to a page port or a touch tone stand alone phone. The paging telephone is connected
to the SP4-TZC allowing it to key the zone codes each consisting of two-digit DTMF tones. See Table 1 on
Page 6 for the dialing scheme. Any Individual Zone or Fixed Zone Group that is not known by the system
will result in a no page condition and the SP4-TZC will start the paging process over.