Welcome Email variables

[tim.medley]

I am wanting to customize the extension welcome letter a bit more and I was wondering what other variables I can pull into the template. Is there a list of these variables?

I know of the following:

$extNo
$pinNo
$vm_number
$myphoneIPPort
$myphoneExternalIPPort
$external_pbx_ip
$sipport
$extension_number
$extension_auth_id
$extension_auth_pw


thank you,

tm