M7310 Phones
Manufactured by Nortel aka Northern Telecom, the M7310 phones offer versatility and easy functions for every day office users. This Nortel phone has to be one of the most popular phones of its time with millions of units sold! The twelve buttons located on the top of the phone have a few different uses. One way to use them is to program them for in-office speed dial, so one touch dialing to reach a colleague. Another way to make your M7310 phone work for you is to use those buttons for out-of-office speed dial. If there is a vendor or client you call frequently, just press that button and you are on your way.
The M7310 phones can be programmed for 1 incoming phone line up to 10. The colored button caps pop on and off, so you are able to alter your phone's appearance for your company's specific need. I would say most commonly businesses use either 4 or 6 lines when operating the M7310 phones.