Mircom

Telephone-entry Mircom panels, the kind that call your phone when a visitor selects your unit, are compatible. If your building runs Mircom hardware in intercom-only mode (handset in the unit, no outside line), there's no call to forward, so it won't work.

Mircom panels typically release the door on a keypress tone (often 6 or 9). Enterkey plays that tone automatically whenever an active key or schedule lets a visitor in.

If you want the full rundown on how phone-based buzzer systems work before you commit, the apartment buzzer guide is a good next stop.

Mircom's TX3 manuals describe two ways a panel reaches a resident. An ADC (auto-dialer) panel sits on its own phone line and dials the number stored for your unit: your home or cell number, up to 18 digits, which visitors never see. An NSL panel rings the phone line wired to your suite instead of dialing a number. ADC panels are the ones Enterkey works with, because the stored number can be your Enterkey number. On an NSL panel with no landline in the suite there is nothing to ring; an apartment buzzer without a landline covers that case.

On a TX3, the resident presses 9 on the call to open the main door. That is the factory default, and the building can change it. The auxiliary door defaults to 6, and 4 refuses entry and hangs up. A building can also give a resident a security code of up to four digits, entered followed by #, in place of the single key. The smaller TX3 Nano works the same way: press 9 unless your administrator changed it.

Source: Mircom's TX3 Programming Manual (LT-979), TX3 Keypad Configuration guide (LT-968) and TX3 Nano Resident Operating Instructions (LT-6156), checked October 15, 2026. If your building uses a per-resident security code instead of a single key, email support@enterkey.app before you switch so we can confirm your setup.

Your property manager or the building's security contractor. Each resident's entry in the TX3 directory holds an apartment number, a name, a dial code and, on ADC systems, the phone number to call, and it is edited at the panel keypad or in Mircom's configuration software. Moving your unit to Enterkey changes only the phone number. This request template says exactly that and how to undo it, and what a buzz code is explains the dial code visitors type.

The test is simple: when a visitor buzzes your unit, does your cell phone (or a phone number you chose) ring? If yes, your system dials out, and Enterkey works by giving it a smarter number to dial. If your buzzer only rings a wired handset inside your unit and can't call an outside line, it isn't compatible.

Not sure? Ask your property manager one question: "Can the directory entry for my unit point at any phone number?" If the answer is yes, you're set: see how Enterkey works, and if you get stuck, support@enterkey.app answers within hours.

Ready to ask? This request template is written to be forwarded as is: it tells your manager exactly which field to change and how to undo it.