Specifications
7
If the paging zones are set for CLASS “B” then the warehouse Individual Zone codes will be “01” through 
“04”, and the front office Individual Zone codes will be “05” through “08”. The Fixed Zone Group code for 
the warehouse will still be “71”, and the front office Fixed Zone Group code will still be “72”. See Figure 2 
for a CLASS “B” example. 
INDIVIDUAL 
ZONE CODES = 
01,02,03,04
FIXED ZONE 
CODE = 71
INDIVIDUAL 
ZONE CODES = 
05,06,07,08
FIXED ZONE 
CODE = 72
INDIVIDUAL 
ZONE CODES = 
09,10,11,12
FIXED ZONE 
CODE = 73
INDIVIDUAL 
ZONE CODES = 
13,14,15,16
FIXED ZONE 
CODE = 74
INDIVIDUAL 
ZONE CODES = 
17,18,19,20
FIXED ZONE 
CODE = 75
SP4-TZC
SP4-APS
SP4-APS
SP4-APS
SP4-APS
SP4-APS
SP40/2
SPB-160
SPB-160
#1
#2
#3
#4 #5
RS485
RS485
RS485
RS485
RS485
TO ADDITIONAL 
SP4-APS SPLITTERS
CONNECT THE SP4-TZC RS485 CONNECTION 
TO THE SP40/2 SP4-APS FIRST. 
Figure 2 
RS485 Communications Path from SP4-TZC to Last CLASS “B” Splitter 
NOTE:  Two CLASS “A” or four CLASS “B” zone codes are assigned to each splitter. If a zone audio 
  output is not used the zone code remains with that splitter. 
Appendix A, in the back of this manual, is a Telephone Page Zone Control Mapping Guide which can be 
used to map the zone locations and zone codes. This can assist the technician as well as the user in 
identifying the locations of the paging zones. 










