Calling Line Identification (CLI)
Short definition
Calling Line Identification (CLI): Information identifying the calling party's number as transmitted by the telephone network.
Meaning and how it works
Calling line identity is supplied through signalling and may be restricted by carrier policy and anti-spoofing checks. Telephone numbering depends on national rules, carrier capabilities and the selected calling route. Customers benefit from consistent dialling formats and reliable number reachability.
Business applications
- Business scenario:
A PBX receives caller identification and may match it to a customer record.
What to check before implementation
Before deployment, verify geographical availability, permitted number formats, tariffs, caller-ID restrictions and both inbound and outbound calling behaviour.