Panasonic KX-TD500 System Reference Manual page 359

Conditions • A special arrangement is required with a local Central Office to utilize ANI
service. Consult with your local Central Office about whether they provide this
service or not.
• ANI service can be utilized with an E-1 "DR2" Channel Trunk whose Dial Mode
is set to "MFC-R2."
• DIL 1:N
If an incoming call comes in on more than two extensions simultaneously,
outside party's phone number is displayed on all call receiver's extensions
(display PITS only)
• Call Forwarding
If "Call Forwarding" (except Call Forwarding to Trunk) is set at the extension,
caller's phone number will be displayed on the extension where an incoming
CO call will be forwarded.
<Display example>
→4771450
" → "indicates that the call has been forwarded from another extension.
3-F-99