# Gb Converter

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Descriptions

The UltraWAVE iGRS (intelligent GPRS Routing System) supports up to 8 SGSNs. There’re two types of SGSNs:

•the new SGSN with a standard IP based Gb interface

•the traditional SGSN with a Frame Relay based Gb interface

iGRS supports the standard R5 Gb/IP network service and the proprietary R98/R99 Gb/IP network service. In order to support the traditional Gb/FR based SGSN, UltraWAVE introduces a Gb converter to converse the protocols between the proprietary Gb/IP and the standard Gb/FR. The Gb converter provides Gb over Frame Relay with E1 or T1 interface from a Gb / IP source.

The principle benefits of the Gb Converter include:

•Enable the iGRS system to connect to the traditional Gb/FR SGSN, so that the iGRS can be used in both the latest IP based GPRS access system and the traditional FR based GPRS access system.

•IPBSS can be used in the RAN, while the RAN is actually connected to a traditional Gb/FR based SGSN.

See Also

• Gb Converter Parameter Dictionary

Feature List

Feature | Descriptions
Capacity | Up to 512 NSVCs (Network Service Virtual Connection) 31 channels (excluded one synchronization channel) per E1 link 24 channels per T1 link 64 Kbps bandwidth per channel
Interface | Standard R5 Gb/IP Proprietary R98/R99 Gb/IP TDM E1/T1 circuit based Gb/FR SNMP interface to EMS (Element Management System)

Basic Services

Gb Protocol Conversion:

•IP to Frame Relay

•Frame Relay to IP

Multiplexing of NSVCs (Network Service Virtual Connection)

•TDM circuit side: differentiate NSVCs with different DLCIs

•IP network side: differentiate NSVCs with different UDP ports

PVC (Private Virtual Circuit) Status Management:

•Notification of the addition of a PVC

•Detection of the deletion of a PVC

•Notification of the state (active or inactive) of a PVC

•Link integrity verification

Operation and Maintenance | SNMP network management IE browser client console Web page based graphic user interface Real time status display System parameter maintenance Remote software upgrade via TFTP Debugging via serial port

Gb Converter Parameter Dictionary

Parameter | Definition | Range
System | -- | --
•Local IP | Specify the IP address of the Gb converter. | Dotted decimal format
•Netmask | A netmask is a 32-bit mask used to divide an IP address into subnets and specify the networks available hosts.
•Gateway | Specify the IP address of the gateway used to pass traffic from Gb converter to other subnets.
•System ID | Specify the system ID of the Gb converter. | 0 - 31
•Sub System ID | Specify the subsystem ID of the Gb converter. | 0
•Peer IP | Specify the IP address of the SGSN. | Dotted decimal format
•Peer Port | Specify the port of the SGSN. | 0 - 65535
•Receive Channel Select | Select up to 31 channels for receiving or transmitting packets. The four dotted decimal numbers can be transferred into 32-digit binary number, each of the right-to-left 31 bits represents a physical channel. •0 = Disable •1 = Enable | Dotted decimal format
•Transmit Channel Select
•Port Type | Specify the type of converter physical interface. | •E1 •T1
•CRC4 Flag | Enable or disable Cyclic Redundancy Check on the converter physical interface. | •Enable •Disable

Return to

• Tasks List

• Elements List

2.1.1.16