tfk technologies GmbH


tfk technologies GmbH
Baierbrunner Straße 33
81379 München
Tel: +49 89 189 43 54-405
Fax: +49 89 189 43 54-15
Description Date Location Time
NW1238 - GPRS / UMTS Roaming 20.02.2020 – 20.02.2020 München 09:00 – 16:00
NW1238 - GPRS / UMTS Roaming 28.05.2020 – 28.05.2020 München 09:00 – 16:00
NW1238 - GPRS / UMTS Roaming 27.08.2020 – 27.08.2020 München 09:00 – 16:00
NW1238 - GPRS / UMTS Roaming 26.11.2020 – 26.11.2020 München 09:00 – 16:00


Course description (english, PDF)

Duration: 1 day

GPRS/UMTS facilitates the transfer of data onto mobile network end-user devices with high data rates and efficiently usage of limited resources at the air-interface. However, without roaming it is not possible to access a data network, which does not belong to the mobile network of the subscriber.

The course covers all essential topics, such as roaming procedures necessary to establish connections as well as data transfer between GPRS and UMTS mobile networks with reference to the current situation on the mobile network market.

Target Group / Requirements

The target groups for this course are specialists out of the area of configuration management who deal with roaming processes as well as managers in development departments and network infrastructure planners. Basic knowledge of GPRS and UMTS core-networks are a prerequisite for this course.

Course Content

Basics of the GPRS core network

  • Overview of the main network elements in GSM/GPRS/UMTS networks
  • Pros & cons of roaming via home & visited networks (HPLMN & VPLMN)
  • Various interconnection possibilities: fully meshed, GRX, internet
  • Background information about: DNS, Charging, SLA, QoS

Basics of the GPRS roaming

  • Prerequisites for GSM and GPRS roaming
  • Overview of the interfaces and processes involved
  • Operator requirements to enable roaming

Domain Name Server

  • General principles and functionality of DNS
  • The need for, characteristics of, and category: specifics of a GPRS DNS

Security aspects

  • The need for security procedures and realisation
  • Security on protocol layers 1, 2, and 3
  • Points for possible unauthorized access

Billing & clearing

  • Main terminology
  • Description of the processes involved and the benefits of using a „clearing house“

GPRS Roaming eXchange-GRX

  • Benefits of using GRX rather than meshed (bilateral) roaming agreements
  • Peering, charging, security and customer care

Implementation of GRX

  • The processes involved in connecting an operator to a GRX
  • An overview of the main steps to GRX, along with a project plan
  • Description of border gateways, IP addresses and APN resolution

Important aspects of GRX peering

  • Benefits and the steps involved in peering GRX networks
  • Explanation of QoS, root DNS and services
  • Interconnection with other technologies such as WLAN


Certificates are given to all participants at the end of the course about the successful completion.


Course GPRS UMTS Roaming
Number NW1238
Contact tfk technologies GmbH
Baierbrunner Straße 33
81379 München
Tel. +498918943540
Place München
Baierbrunner Straße 33
81379 München
Price € 610,00
VAT excl.

tfk technologies GmbH
Baierbrunner Straße 33
81379 München
Tel.: +49 89 189 43 54-0
Fax: +49 89 189 43 54-15 

Publishing Information / Data Protection
General Business Terms
Copyright 2018 tfk technologies