Introduction

This chapter will use the example of a bintec RS232bu+™ gateway to show a remote maintenance option using GSM/GPRS dial-in. The bintec RS232bu+™ gateway establishes an Internet connection using the internal UMTS (HSPA+) modem. To enable the dial-in for remote maintenance purposes (without using the Internet), you need to switch the integrated UMTS (HSPA+) modem from the UMTS service to the GSM/GPRS network. This UMTS fallback function is initiated by a remote phone call. After the integrated UMTS (HSPA+) modem has been logged into the GSM/GPRS network, a connection to the remote maintenance service from a different bintec™ ISDN gateway can be established using the ISDN login service. Alternatively, an ISDN remote access connection (PPP dial-in) can be established to the bintec RS232bu+™. When the remote maintenance connection is ended, the bintec RS232bu+™ gateway can log back into the UMTS network and establish the Internet connection.

A UMTS gateway in the bintec RS series (e. g. bintec RS232bu+™)
For this gateway, a mobile phone tariff that enables voice and data connections needs to be used
For the UMTS gateway in the bintec RS series, a 7.10.1 or later firmware version should be used.
For the integrated modem of the UMTS gateway in the bintec RS series, the current modem firmware must be used (link to Release Notes)
A telephone/mobile phone to remotely initiate the UMTS fallback
A bintec ISDN gateway e. g. bintec R3002™ to start the remote maintenance connection by ISDN login
An ISDN line with V.110 support to start the remote maintenance connection

Introduction

Requirements