General Info on Cortelco 2720 - Manual and Guide

Updated by on Mar 1, 2024

Cortelco corded landline phone for headsets

Firstly, here is the Cortelco 2720 Manual

Now we can talk about all the awesome features this office phone has!


Cortelco 2-line telephone facts and features

  • Works with any of our wireless or corded options. Works with lifters too.
  • Caller ID, call waiting caller ID
  • 99 number Memory
  • Wide angle, adjustable, backlit (blue) LCD display
  • Voice mail indication
  • Mute with LED indicator
  • Hold with LED indicator
  • PBX hold (programmable)
  • On hook pre-dial (through speaker)
  • Directory button (save up to 99 names and numbers)
  • 5 One touch and 5 two touch speed dial memory locations with up to 24 digits
  • Programmable flash
  • Conference
  • Enhanced redial for last 10 numbers
  • Handset receiver volume control (4 levels)
  • Programmable ring tones (10 positions)
  • Programmable ring volume (off to 7)
  • Programmable VIP alert
  • Data port
  • Speakerphone
  • Speakerphone volume control (8 levels)
  • DTMF dialing (what is DTMF? Search for it in Answers)
  • Programmable area code
  • 2.5mm & modular RJ9 headset jacks ( For RJ9,Please use Sennheiser Quick Disconnect Easy Connect Cord, 26716
  • Wall mountable


Time for a new headset?

Many Cortelco phone users have switched to the Leitner LH270!

What is Headset Answers?

This is the internal support database for Headsets.com. We manufacture and sell office headsets in North America. With over 25 years' experience in the business, we know headsets.

Please use our support database for free headset support, whether you’re a Customer of ours (or not). If you have problems, suggestions, or unanswered questions, please email us at hello@headsets.com (compliments also welcomed 😀)

Looking for office headsets in the UK? Check out Headsets.co.uk.

Leitner LH470 Wireless Dongle Headset
Leitner Headsets logo

Ready for a better headset?

What is Headset Answers?

This is the internal support database for Headsets.com. We manufacture and sell office headsets in North America. With over 25 years' experience in the business, we know headsets.

Please use our support database for free headset support, whether you’re a Customer of ours (or not). If you have problems, suggestions, or unanswered questions, please email us at hello@headsets.com (compliments also welcomed 😀)

Looking for office headsets in the UK? Check out Headsets.co.uk.

Questions/comments?