Adc And Nsl; Types Of Calls; Figure 2. Pstn Call - Mircom TX3 Series Configuration Manual

1.3

ADC and NSL

The TX3 Nano supports 1 ADC or 1 NSL telephone line.
An ADC (autodialer controller) connection requires a dedicated subscriber
telephone line service connected to an outside telephone line. This connection
lets the visitor call the tenant and access their voice mail.
An NSL (no subscriber line) connection uses the existing building telephone
lines for communication and does not require a separate telephone line. This
system may consist of one or more TX3 Nanos connected to TX3-NSL-8M NSL
Units, typically located in the electrical/telephone room of a building. The NSL
units intercept all telephone lines into the building's suites and communicate
directly to the resident phone using the TX3 Nano.
Note:
1.4

Types of Calls

In all cases, the TX3 Nano can accept DTMF tones, which allow the resident to
open the door for the visitor, or to disconnect the call without opening the door.
1.4.1 PSTN Call
The TX3 Nano makes calls over the PSTN (Public Switched Telephone
Network), as shown in Figure 2.
TX3 Nano Configuration Manual
8
Copyright 2019
Non-configurable PBX systems are not supported. For more
information, contact technical support at Mircom.

Figure 2. PSTN call

Introduction