Don't send the device a huge config file, there's no need. You'll end up with a device that reboots when you don't expect/desire it and you'll have a huge file to troubleshoot if you inject any syntax errors.
The SPA devices use "sane defaults" so a factory defaulted device only needs changes specific to your deployment in order to work.
The device's config file only needs to be a handful of lines long.
You have a Cisco Unified Communications Manager (CUCM) system and want
to configure a SPA112 analog telephone adaptor (ATA) to register to the
CUCM so that you can use up to two analog phones or similar FXS devices
with the CUCM.In this application note, ...
This document is a must-read for all SPA232D installers, administrators,
and users. The document takes you from unboxing the SPA232D ATA and
SPA302D DECT handsets, through DECT handset registration, and connecting
to the PSTN and ITSP.The document describ...
Save yourself hours or even days of searching for ATA resources by using
this document!Turn View Bookmarks on when viewing the document for best
navigation. [View > Navigation Panels > Bookmarks]Use the links in this
document to easily locate resources re...