NAS with freeradius and telephone number

[Magui]

excuse me, somebody know if freeradius can see of some way the telephone number that one remote user is wearing in order to call me with his modem.My line(pair of copper) give me this information trhough a single  telephone ,then can a NAS with freeradius give me the same information.
if the answer is yes, how i can see that information, i need to use this for make an authentication process.Any orientation will be welcome.

thank you for any help.

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