How to read base data ?

[oliv]

Hello,

One customer sent be back a defective W56H handset.
This handset was associated with a W56B.
(The issue was it didn't ring anymore).

When I enter this phone Settings/Registration/Register Handset menu, it display 4 Base 1/Base 2/Base 3/Base 4 entries.
In Base 1 entry, I can currently read something like 02008-1C376h.
What this 02008-1C376h value mean ? Is it supposed to match a MAC address ? An IPEI ? Something else ?

Best regards