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Appendix C
Centrex operation
Centrex is a special subscriber service that might 
be available from your local telephone company 
for a fee. This 1080 telephone can be used with 
Centrex service to answer calls and pick up other 
lines. Contact your telephone company for more 
details about Centrex service.
Set ring delay duration
The 1080 phone system enables other system 
telephones’ calls to ring at the console phone. 
After a specified ring delay, the calls ring at the 
console phone. (See CSL DELAY RING on page 75 
of the installation guide.)
Answer a delayed ring
The console phone rings and the screen displays 
the extension number of the intercom sending the 
delayed ring. 
1. S
elect an idle line.
2. Enter the Centrex pickup code.
3. Enter the seven- or ten-digit phone number (as 
directed by your phone company) of the exten-
sion sending the delayed ring.
 NOTE: If the console is using another line and 
receives a delayed ring, the console phone can 
put the other line on hold and follow steps 1–3. 
If the console is on an intercom call, the intercom 
call should be ended before picking up the ringing 
phone.
Pick up another station’s line
1. Choose an idle Centrex line.
2. Enter the Centrex pickup code.
3. Enter the seven- or ten-digit phone number (as 
directed by your phone company) of the desired 
line you want.