Linear
A Linear intercom (AE1000Plus, AE2000Plus, Entry Pro) dials the phone number stored for your unit. Here's how it reaches your cell and which key opens.
A Linear intercom at an apartment door or a vehicle gate is a telephone entry system: the visitor enters your directory code, and the panel dials the phone number stored for your unit over a phone line. Because it simply places a call, it can ring your cell phone, or an Enterkey number that answers for you and opens the gate when a key is active. The panel never knows the difference.
Can a Linear intercom call a cell phone?
Yes, if the panel at your entrance calls a phone when visitors enter your code. Linear's installation instructions for the AE1000Plus and AE2000Plus describe it plainly: the visitor enters a directory number, the system dials that resident's telephone number, and the two talk hands-free. The resident's number is never shown on the display, and if the line is busy the visitor sees a busy message.
Each directory entry holds a directory code, a last name, a first name and a phone number, so the number can be any line the panel can dial, including a cell. Panels behind an office phone system can add a dialing prefix before the number. Systems wired only to handsets inside each unit, with no outside line, are the exception.
Which key opens the gate on a Linear intercom?
The resident presses a digit on their phone's keypad during the call. On the AE series one digit opens the first relay (usually the main door or gate) and another opens a second relay, such as a pedestrian gate; pressing the disconnect key or hanging up refuses entry. Linear notes that the installer can customize these keys, so the right digit depends on how your panel was set up: ask your manager or the company that services the gate.
Talk time is 60 seconds by default and can be set from 15 to 255 seconds on the AE1000Plus and AE2000Plus; the resident hears beeps in the last 10 seconds and can press # to extend the call. The newer Entry Pro panels allow 30 to 300 seconds. Once Enterkey knows your panel's digit, a timed key plays it for you, so a courier is let in on the first call.
Who programs the Linear directory?
The property manager or the access-control company that services the gate. On the AE1000Plus and AE2000Plus the directory is edited at the panel keypad in programming mode, or from a computer over the built-in modem or serial port. On Entry Pro panels it is a user profile in the browser software, where the phone number field must hold a valid number for the visitor call to connect. Either way, pointing your unit at a new number is one field; this request template is written to be forwarded as is.
Sources: Linear AE1000Plus and AE2000Plus installation instructions (2008), Linear AE1000Plus, AE2000Plus and AM3Plus local programming manual (2008), and the Linear Entry Pro (EP) quick start guide 10027495-B, checked October 17, 2026. For how Linear compares with other panels, see the apartment call box page and the apartment buzzer guide.
How do you tell if yours is compatible?
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.
Try it on your own buzzer
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