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1) What does a GRX provider offer a network operator? |
The GRX provider assists operators in their GPRS roaming business. GRX providers are facilitators offering the following features:
- Transmission of data packages between operators and their roaming partners
Different connection types between operator and GRX are possible:
- Leased Line (LL) based on Frame Relay, ATM or IP/PPP (based on MPLS in early 2005)
- Tunnelling or VPN connection via public IP (IPSec strongly recommended)
- Virtual Private Data Network (VPN) based on leased line
- Guaranteed compliance with IP addressing guidelines on the Inter-PMN backbone
- DNS root service for customer operators
- BGP-4 routing capability
- Routing of traffic between GPRS networks and/or GRX nodes
- Interconnectivity to other GRXs, governed by Service Level Agreements between GRXs
- Data Security: IPSec (if applicable), anti-spoofing and non-visibility to public internet
- Four Class of Service (CoS) options when MPLS becomes available in early 2005
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GRX
