I believe the “variable_” prefix only applies to CDRs and logs. When processing them in the dialplan omit the “variable_” prefix and just use

pre_transfer_caller_id_name

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http://freeswitch.org/confluence

From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Paul Atreides
Sent: Sunday, 15 March, 2015 11:43
To: FreeSWITCH Users Help
Subject: [Freeswitch-users] Channel Variable: variable_pre_transfer_caller_id_number

Hi,

<action application="info"/>
when I call the info app in my dial plan then I can see the following vars in my log

variable_pre_transfer_caller_id_name: []
variable_pre_transfer_caller_id_number: [18]

But when I try to access one single channel variable its always empty. Why?
${variable_pre_transfer_caller_id_number}

Thank you for your help.