Well of course, if you don't need to record the internal calls an if the telecom trunks are less, then trunk recording is cost effective.. I asked it related with my other topic... We have extension based recording, and there are lots of problems due to mdf or cabling and also ports on Nice extension cards. And we decided to have a trunk side recording as a backup system beside the extension based recording. And i try to get an info of cost an approximately for this backup system.
Thanks anyway.