Site Short Codes
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Site short codes work the same for deployments that use shared lines
across sites as they do for "real site" deployments. That is, short
codes can be added to a site to allow shorter, convenient numbers to be
dialed that are transformed into longer directory numbers. Normally,
short codes are added to real sites that contain devices in order to
allow users of those devices to dial shorter numbers to reach exiting
directory numbers.

Because the inventory site doesn't contain devices, but only line
inventory, site codes don't need to be added to the inventory site.
Short code translation patterns are created on a site's Allow Internal
(AInt) route partition.