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 phones 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.