Cellular Network Infrastructure » Radio Access Network » OsmoBSC

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= Getting started with Openbsc and an ip.access nanoBTS =

This page describes how ot configure + set up an ip.access nanoBTS to use it in conjunction with OpenBSC (i.e. [osmo-nitb] or [osmo-bsc]).

Please note once again that the Osmocom project has no affiliation and no contact with ip.access.  All information here is presented

based on our own experience only.  If you have official documentation by the manufacturer, you should probably consult that instead

of using this wiki page.

== Physical set-up ==

=== Power supply ===

The nanoBTS uses PoE (Power-over-Ethernet).  It does not have any other power connector, so you will have to use a PoE-Injector (aka ''mid-span'')

or a PoE capable switch (like the Netgear FS-108P for a small desktop switch).

Please note the power demand of the nanoBTS is quite high for a PoE powered device.  You may not be able to use all the PoE ports of your switch

for nanoBTSs.  Check with your switch vendor and/or ip.access.

On first sight, there appear to be three RJ-45 jacks on the nanoBTS.  However, two of them are actually RJ-69 (10-pin) and only used in stacking

configurations (see [nanoBTS_multiTRX] for details).  This leaves only 1 real RJ-45 marked '''LAN/48VDC''', and that's where you connect your

powered Ethernet.

=== Antennas ===

There are four SMA connectors, one on each corner.

 * RX (receive antenna for uplink)

 * TX (transmit antenna for downlink)

 * NWL (network listen, a special mode where the BTS behaves like a MS to receive other BTSs)

 * AUX (once again only used for stacking, see [nanoBTS_multiTRX])

RX and TX should each be connected to an antenna, either the small factory-supplied antennas, or some larger antenna or even an RF distribution

system or an external LNA + PA + Duplexer kit.

'''Do not power up the device without a TX antenna'''

== Network setup ==