User's Manual

6 System Description
Chapter 1 - Products Description
1.4 Voice and Networking Gateways
The following Gateways are currently available from Alvarion:
 IDU-NG-4D1W: A Networking Gateway with advanced routing capabilities that
serves also as an IDU for the PRO-S CPE, supporting 4 data ports and 1
Wireless LAN port.
 VG-1D1V: A stand-alone (external) Voice Gateway, connecting to the Ethernet
port of the CPE and supporting 1 data port and 1 POTS port. Available in
either SIP or H.323 model.
 VG-1D2V: A stand-alone (external) Voice Gateway, connecting to the Ethernet
port of the CPE and supporting 1 data port and 2 POTS ports. Available in
either SIP or H.323 model.
 IDU-1D1V: A Voice Gateway with battery backup that serves also as an IDU
for the PRO-S CPE, supporting 1 data port and 1 POTS port. Available in either
SIP or H.323 model.
 IDU-1D2V: A Voice Gateway with battery backup that serves also as an IDU
for the PRO-S CPE, supporting 1 data port and 2 POTS ports. Available in
either SIP or H.323 model.
Details on installing, managing and using the Voice Gateways and the Wireless
Networking Gateway are provided separately in the relevant manuals.
These Gateways incorporate an advanced protocol (DRAP) for automatic
registration and allocation of wireless link resource.
1.4.1 DRAP (Dynamic Resources Allocation
Protocol)
DRAP is a protocol based on IP/UDP between the Gateway (installed behind the
SU) and the BreezeMAX system. The protocol provides an auto-discovery
mechanism for the Gateway, so no specific configuration is required and the
Gateway can automatically locate and register with the BreezeMAX base station.
The protocol uses a few simple messages enabling a Voice Gateway to request
resources when calls are made, and the BreezeMAX to dynamically allocate them.
Using the DRAP solution has the following advantages: