I added the following line of code to the template.
account.1.cid_source = 5
I did this for templates for the Yealink T54W, T46s, and T46G.
The full list of options for Yealink are:
Description:
1.It configures the presentation of the caller identity when receiving an incoming call for account X.
CFG Configuration:
account.X.cid_source
Valid Value:
(0-FROM;1-PAI;2-PAI-FROM;3-PRID-PAI-FROM;4-PAI-RPID-FROM;5-RPID-FROM)