Use the Partner 206E Release 4.1 module to add 2 lines and 6 extensions to your system
Extension ports are designed for either Partner multi-line telephones or single line devices such as modems or fax machines.
Partner 206E R3.1 or greater required to signal message waiting lights on compatible single line telephones http://www.northernbellnetworks.comavpa20morel4.html $175.00
Product Description
Avaya Partner 206E Module Rel 4.1
Use the Partner 206E Release 4.1 module to add 2 lines and 6 extensions to your system
Extension ports are designed for either Partner multi-line telephones or single line devices such as modems or fax machines.
Partner 206E R3.1 or greater required to signal message waiting lights on compatible single line telephones