The Optus Loop 4-Line Key Telephone System is a replacement solution for the traditional PABX Key System environment.

A single 4-Line Key Telephone System station (license) can be assigned to multiple individual lines on a single or multiple Yealink phone simulating a traditional key system, i.e. a single telephone line number visible as 4-line appearance and being able to be answered on up to 35 phones.

Click here to download the user guide.