Automatically prepend 9 when dialing from call history

[ictc]

Hello,

We would like to know if it's possible to have our Yealink SIP-T46G handsets automatically prepend a 9 when dialling a number from the call history screen (e.g. Missed, Placed, Received, Forwarded).

The problem is that our PBX is set up so that we must add 9 to the number we want to dial so that it will dial outside of our office, but when the numbers are dialled from the call history screen it attempts to dial the numbers directly without 9 prepended. If we use the dial plan "replace" rules (prefix = "(.)", replace = "9$1"), we can sort of work around this, however it also removes the requirement that the user first dials 9 to dial external numbers.

Our PBX is Elastix 2.4.0 (Asterisk 11.10).

Any suggestions or advice is appreciated. Thank you.