| Users: | L- | 
| Hints: | -R | 
| Huntgroups: | LR | 
| Additivity: | Append | 
| Proxy propagated: | No | 
This Attribute allows the NAS to send in the Access-Request packet the phone number that the call came from, using Automatic Number Identification (ANI) or similar technology. It is only used in Access-Request packets.
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