SIP CME - authentication register

For SIP CME configuration, you will find local phones can register to CME without the need of "authentication register" command.  The CME will authenticates the MAC address compare with the ARP request.

For remote phones that are NOT in the same subnet, SIP digest authentication is required.  You need username and password stored in the phone config file, and compare it against the voice register pool.

Without "authentication register", when you do a "debug ccsip message", you will see 401 Unauthorized for the remote phones.

"authentication register" is a global settings and will affect all phones.

Sample configuration

voice service voip
allow-connections sip to sip
sip
bind control source-interface vlan102
bind media source-interface vlan102
!
voice register global
mode cme
source-address 1.1.1.1 port 5060
max-dn 20
max-pool 20
authenticate register
!
voice register dn  1
number 1001
!
voice register pool  1
id mac 0011.2233.4455
type 3905
number 1 dn 1
dtmf-relay sip-notify
username 1001 password cisco
codec g711ulaw