Numbering Plan

Setting up the numbering plan: Go to System > Numbering Plan > Main > Extension >

Managing of extension and planning the number of digits is always possible either you are planning to make the 2 digits, 3 digits extension for every users. In KX-TDA600 Panasonic Hybrid System the default digits of extension is 4 digits, whereas in KX-TDA100 and 200 is 3 digits.