Add the rules into the 46xxsetting file and reboot the phone.
SET ENHDIALSTAT 1 - 1 means to enable enhanced local dialing
SET PHNCC 1 - Country code
SET PHNDPLENGTH 9 - Extension length
SET PHNLDLENGTH 4 - National telephone number length
SET PHNOL 7 - Dial access code which will be prefixed if anybody dials to a missed call from the phone call log
############# ENHANCED LOCAL DIALING RULES ###############
##
## These settings affect certain dialing behaviors, such as
## dialing numbers from the incoming Call Log or from web
## pages
##
## Dialing Algorithm Status
## Controls whether algorithm defined by parameters in
## this section is used during certain dialing behaviors.
## 0 disables algorithm.
## 1 enables algorithm, but not for Contacts
## 2 enables algorithm, including Contacts (96xx SIP only)
SET ENHDIALSTAT 1
##
## Country Code
## For United States the value is '1'
SET PHNCC 1
##
## Internal extension number length
## If your extension is 12345, your dial plan length is 5.
## On 46xx phones, the maximum extension length is 10.
## On 96xx phones, the maximum extension length is 13.
## This value must match the extension length set on your
## call server.
SET PHNDPLENGTH 4
##
## International access code
## For the United States, the value is 011.
SET PHNIC 011
##
## Long distance access code
SET PHNLD 1 or “” or ## to remove digit "1" to be auto-inserted
##
## National telephone number Length
## For example, 800-555-1111 has a length of 10.
SET PHNLDLENGTH 10
##
## Outside line access code
## The number you press to make an outside call.
SET PHNOL 8 ------------------->>>>> to enable 8 to be used to place outside call
