###sip.conf

[phone1]
type=peer
;username=phone1
;secret=test
callerid="Wiizard" <101>
host=dynamic
nat=yes
careinvite=no
context=office

[phone2]
type=peer
;username=phone2
;secret=phone2
callerid="Wiizard DeskPhone" <102>
host=dynamic
nat=yes
careinvite=no
context=office

phone 2 is grandstream 100
phone 1 is xlite