Panasonic
PABX KX TES 824
Expanable from 3 CO lines and 8 extensions to 8 CO lines and 24 extensions 
Flexible SMS Routing 
Built in Voice Message ( BV) 
Caller ID Display on SLTs and APTs. 
Built in DISA ( 3 level Automatic Reception with Voice Guidance) 
Uniform Call Distribution ( UCD) with Message improves call-handling efficiency 
Various call forwarding features - never again miss an important call 
Calling activity reports ( Station Message Detail Recording, account code entry, and toll restriction help you manage telephone cost more 
Door Phones, Door Opener, Door Bells.