Как бы все просто, в users.conf вяжем MAC аппарата c учеткой
[121](phones)
username=121
secret=qdfsdfsdwrsdf86
callerid=121 <121>
autoprov=yes
profile=YealinkT21PE2
macaddress=001565E36E4C
#!version:1.0.0.1
### This file is the exported MAC-all.cfg.
account.1.enable = 1
account.1.password = qdfsdfsdwrsdf86
account.1.label =
account.1.user_name = 115
#!version:1.0.0.1
### This file is the exported MAC-all.cfg.
account.1.enable = 1
account.1.password = ${SECRET}
account.1.label = ${LABEL}
account.1.user_name = ${USERNAME}
account.X.enable = 1
