Silver Spring Networks Access Point

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  Top of Housing
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  Interior showing cellular modem and circuit boards
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  Inside of metal lid
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  Model number
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  GPS and cellular antenna connector
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  Power connector

On-air identification and role

(From passive capture of a fixed-AMI NIC 511 network — see Silver Spring Networks Protocol for the frame format.)

Access points are the root of a local mesh cell: endpoints and relays route toward them, and they backhaul to the utility head-end over cellular (the modem in the teardown photos above) or fibre.

They are addressed by EUI-64, distinct from endpoint meters:

• Access point / infrastructure: 00:13:50:FF:FE:60:xx:xx:xx — the

 Silver Spring OUI 00:13:50 with the standard MAC-48 → EUI-64
 FF:FE expansion. The Itron OUI 00:07:81 is also seen
 post-acquisition.

• Endpoint meters: serial form 00:13:50:05:00:xx:xx:xx.

An access point is not heard directly from an endpoint's vantage — it sits on the far side of the tree on channels a fixed receiver near one meter does not follow. It is identified instead by reference: a relay lists its uplink access point(s) in its beacon's neighbour records, each with a link-quality metric. In one capture a relay was dual-homed to two access points (a stable primary and a volatile secondary) for the whole observation window.