User's Manual

APPENDIX A: BACKHAUL REQUIREMENTS
2003 IPMobileNet, Inc. 33 IPSeries MR User Manual / Rev. A / 04-September-03
Serial Backhaul Capacity
The backhaul with the fastest speed that can provide clean, reliable, and dependable transmission should
be considered when dealing with backhaul capacity. IPMobileNet’s base stations operate at four (4) data
transmission rates, which include the following:
§ 115,200 bps
§ 57,600 bps
§ 38,400 bps
§ 19,200 bps
The optimal goal is to select a backhaul data rate that remains ahead of the base station’s data
transmittal. For example:
Base Station Backhaul Results
19,200 bps 19,200 bps
Backhaul does not have the opportunity to remain
ahead of the base station’s transmittals if data
packets are dropped or need to be rebroadcast from
the IPNC to the base station.
19,200 bps 57,600 bps
System will be more efficient and always operate at
the base station’s peak performance never waiting for
data to arrive from the IPNC.
The 56 Kbps DDS line is typically used to create the 57,600 bps asynchronous data line for the serial line
Internet protocol (SLIP) connection between the Internet Protocol Network Controller location and the
base station site.