Filter
Top Products
Administrator programming: An introduction IVX S-Class Administrator’s Manual
A.6
System fixed numbering plan
Numbers
Generation II Generation I
Function
0 0 Operator
1–16 1–16 CO lines
100–131 100–123 Digital extensions
132–139 124–129 Analog extensions
199 199 Overhead paging port
290–299 Department numbers
300–489
1
300–309 Guest/info mailboxes
500 Broadcast mailbox
520–529 Cascade mailboxes
560–580 Feature codes
590–594 MOH recordings
600–699 System speed-dial
Note: If unsure whether your IVX S-Class system is Generation I or Generation II, consult your ESI Reseller.
Alternatively, if you have physical access to the IVX S-Class system cabinet, see whether the text
“Generation II” appears in small lettering on the cover’s label.
1
If using system software version 4.7.0 or later; otherwise, same as Generation I.