You are performing route pattern configuration. You need to ensure that internal extensions are automatically expanded to full external phone numbers for calling line information on outgoing calls. What should you use?
Calling extension expansion.
Called number expansion.
External number mask of the called party.
External phone number mask of the calling party.
Want to practice for 300-070 - Implementing Cisco IP Telephony and Video, Part 1 (CIPTV1) ?