AMERIPHONE voice carryover phone. Designed for people with profound hearing loss that still want to use their voice, Read & Talk (voice carry over calls must be placed through toll-free relay service) programmable relay service speed dial button, 12# memory, oversized keypad, visual ringer.
Built-in text answering machine
Supports normal TTY communication (45.5 and 50 baud)
Visual ring indicator
Programmable emergency button transmits user's name, address and phone number in text for quick response by emergency services
Increases incoming sounds up to 26 decibels
Adjustable tone control (600-2400Hz)
Extra-loud (85+ decibels) ringer with adjustable ring volume
OFFICE PHONES 
VoIP PRODUCTS 
When 2 or 3 handsets is enough...