aaa group server radius rad_eap
server auth-port 1645 acct-port 1646
!
aaa group server radius WDS-AUTH
server auth-port 1812 acct-port 1813
!
aaa group server radius VOICE-AUTH
server auth-port 1812 acct-port 1813
!
aaa authentication login eap_methods group rad_eap
Both of the SSID are calling to eap_methods. What you need to do is configure another aaa authentication line:
** aaa authentication login phone_method group VOICE-AUTH**
then call that as your network-eap:
dot11 ssid VOICE
vlan 50
&