Telstra’s IP Wireless offers NextG mobile connectivity to your business applications. You can now access any of the applications available on you Private IP virtual private network (VPN) using General Packet Radio Service (GPRS) or the recently released 1X platform.

GPRS is a standardised packet switched data service for Global System for Mobile communication (GSM). 1X is the packet switched data service for Telstra’s second mobile cellular network, the Code Division Multiplex Access (CDMA) service. Telstra’s CDMA 1X offering is based on the 1XRTT standard. 1XRTT is an evolution of the existing CDMA technology, and Telstra's initial entry into the “3G” technological space

Mobile data users (GPRS/1X) are ‘online’ all the time with the price of the service determined by the volume of data that is sent and received rather than the session length. Private IP also includes other value added hosted network technologies and applications (Telstra Dedicated Hosting, Co-Location, Advanced Messenger, Extranets, Virus Protection and Content Filtering). All these value-added services are available via Private IP’s comprehensive range of access technologies (Frame Relay, ATM, ISDN, Internet, ADSL, standard fixed telephone service and now GPRS).

1. Telstra’s IP Wireless delivers the following benefits:

• Simple and secure access to corporate applications and data for roaming users (e-mail, Internet or any other network-based application).

• Better performance and security than using GPRS/1X and the Internet to access your corporate network.

• Online all the time (after logging into the GPRS/1X platform the session can be held up by the user with the cost determined by the volume of data that the user sends and receives).

• Capacity to grow with business success.

• Telstra managed authentication services.

• Access to relevant expertise.

• All the value added features of Private IP available to the GPRS/1X user.

2. Technology Features

• GPRS access speeds are dependent on the number of time slots available. The number of time slots used to transmit data is dependent on GPRS handset capability and the deployment of the GPRS network. Indicative speeds are up to 12kbps upstream and up to 48kbps down stream. The speed achieved among other things depends on the model and the type of handsets, GSM coverage and electrical Noise levels etc.

• CDMA 1X provides a packet-mode data connection environment for customers using suitable handsets or other devices but at higher peak data rates. For example, data bursts are expected to achieve peak speeds of up to 144 Kbps for the download link and lower figures for upload link, subject to the pricing plan that a customer chooses and CDMA network coverage.

• End user devices such as laptops and PDAs communicate with the GPRS/1X handsets using Point-to-Point Protocol (PPP) over a serial, irDA or Bluetooth connection.

• The connection between the Telstra GPRS/1X network and Telstra Private IP network is provided over a pair of redundant Asynchronous Transfer Mode (ATM) links. The ATM links are a shared infrastructure for all IP Wireless customers.

• The segregation of user traffic between the GPRS/1X network and the Private IP VPN is achieved with the use of PPP and Layer 2 Tunnelling Protocol (L2TP). Customer service selection is determined by the use of Domain Name and Access Point Name (APN).

• The “telstra.corp” APN is used to direct GPRS/1X connections towards the Private IP network.

• Domain Names are used to direct particular GPRS/1X connections to their appropriate Private IP service. For example:
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• Authentication is controlled via customer-supplied username and password. The authentication function can be supplied via customer supplied or Telstra supplied (and managed) RADIUS server (Remote Authentication Dial-In User Service).

3. Broad Coverage

IP Wireless is available on both of Telstra’s mobile networks:

• GSM ~ GPRS has broad coverage, extending over our entire GSM network ~ with the exception of a small number of remote locations that use extended cellular technology

• CDMA ~ 1X has recently been enabled in the metropolitan Sydney and Melbourne and some regional areas. Check www.telstra.com/info/cdma1x for the latest CDMA 1X coverage information.

* Telstra may withdraw this offer at any time, after which new customers will experience maximum downstream data speeds of up to 72kbps. Speeds referred to are maximum achievable downstream data speeds. Upstream speeds over the CDMA 1X service will be lower than the downstream speeds. Actual user speeds will vary depending on user location, network capacity, mobile device used, transmission direction and external constraints (including, without limitation, the application in use).

5.Customer Requirements

• A Private IP VPN. (IPWAN)

• GPRS or CDMA 1X enabled mobile devices with a subscription to “telstra.corp” APN.

• Customer supplied RADIUS servers need to be connected to the Telstra RADIUS proxy via a customer-supplied authentication link. The authentication Permanent Virtual Circuit (PVC) can be commissioned via the Telstra Private IP network or a dedicated Frame Relay PVC.

• The user device that is initiating the IP Wireless session has its IP addresses allocated by the RADIUS server as part of the authentication process. The IP addresses must be supplied by the customer (regardless of whether it is a customer or Telstra supplied RADIUS server).

• Regarding Radius Server please be advised that “InTechnology” have helped set up the Telstra Dial IP and the GPRS radius servers. The product that is used is the Steel Belted Radius. The steel belted radius installed although is a service provider version there are corporate versions available. More information regarding this service can be found at:

http://www.intechnology.com.au/

Summary of end to end Security on GPRS/1X and IPWAN

1. GPRS/1X

Security in the GPRS and CDMA 1X networks are at a similar level to that applied in a standard GSM/CDMA networks. Security is applied at the initial connection to the network (authentication) and for the data and signalling sent over the network (encryption). GPRS/1X authentication and encryption is handled within the GPRS/1X infrastructure by the relevant Serving Support Node.

Authentication.

GPRS Example: The particular GSM mobile phone service attempting to connect to GPRS is authenticated for valid network ID as for standard GSM. GPRS access validity is then checked and the specific level of GPRS service and the APN requested is authenticated. Access is only allowed to the APNs explicitly assigned to the particular mobile service ID.

Encryption.

All data and signalling to and from mobile devices is encrypted using the GPRS encryption algorithm (GEA), which is a stream cipher similar to A5 used in standard GSM.

2.IPWAN Security

Fixed access connections like Frame Relay and ATM into IPWAN give a customer a permanent virtual circuit (PVC) to their own VPN. All traffic is checked at each Virtual Router, which aims to ensure that no traffic from unauthorised sources passes through.