Datasheet: https://www.juniper.net/us/en/local/pdf/datasheets/1000255-en.pdf
Reference Architecture Components
Subscriber Access Network Overview
...
S-SA-FP (Subscriber access feature pack)
S-SA-NK (Subscriber Access Feature Pack License Scaling Limit to NK Subscriber)
S-SA-4K/8K/16K/32K/64K/96K/128K/256K
Optional:
S-SSP-FP (Secure Policy feature pack license (intercept subscriber traffic securely)
S-SA-FP: 10 licenses are active when ordering the S-SA-FP
Licenses for Radius
subscriber-address-assignment - Radius/SRC Address Pool Assignment
Session and Resource Control
( Juniper SRC product: https://www.juniper.net/documentation/en_US/junos/topics/concept/jsrc-overview.html)