A 1990s IANA registration for satellite telemetry acquisition; effectively nothing runs here today.
IANA assigns 1501 (TCP and UDP) to "saiscm", the Satellite-data Acquisition System 3, registered by Bill Taylor in the era when the registry was filled by individual vendors writing in. There is no public specification, no maintained implementation, and no commodity software that binds this port. If a scan shows 1501 open, the registration tells you nothing useful about what is actually listening.
Expose with care
An open 1501 is an unidentified listener, not a known service — find the process that owns it before deciding anything, because the registry name is not evidence of what is running.
$ nc -vz -w 3 TARGET 1501Seen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
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Corrections or a missing port? Reply @rimrocksystems.