POTSwap User Guide JA16-UM
Page 4 Rev: P05 Date: 09/08/15
© Copyright 2015 Janus Remote Communications
Specifications subject to change without notice
All Rights Reserved See website for latest revision. Not intended for life support applications.
1 POTSwap General Description
The POTSwap allows landline telephones and modems to replace their POTS (plain old telephone service)
connection with a wireless cellular connection. An internal landline modem allows legacy dial-up modem equipment
to connect to remote TCP/IP networks. Fixed location voice applications can connect directly to the PSTN (public
switched telephone network). Both dial-in and dial-out data and voice applications are supported.
An FXS connection (RJ11 jack) provides complete Central Office emulation including dial tone, ringing and busy
signal generation as well as DTMF detection and generation. The POTSwap emulates all the functions of a wired
telephone connection, is fully compatible with all common modem standards and can be configured to emulate all
international telephone line standards.
Wireless connectivity is provided by the Janus line of Plug-In Terminus terminal modems which provide support for
all current mobile network technologies with service available from numerous wireless carriers.
Configuration of the POTSwap can be achieved via a local serial interface connection.
2 Plug-In Terminus
Cellular communication for the POTSwap is powered by Plug-In Terminus terminals. Plug-In Terminus offer easy
integration and interchangeability of communication protocols between GSM/GPRS, CDMA, UMTS, EVDO and more
by combining full M2M functionality with the flexibility of a standard “plug-in” DIP design. These terminals share the
same mechanical footprint and offer users the ability to configure their applications for communications via any cellular
protocol. The POTSwap provides one platform that supports current cellular technology with the future in mind.
Figure 1 POTSwap Block Diagram
