Allow for 4-digit transferring and conference dial-out
While a 4-digit dial plan and normalization works for regular dialing out via Direct Routing, transferring to a 4-digit number or getting called by a 4-digit extension for a transfer always fails. This also applies to dialing out from a conference call.
While this is considered a known issue, I want to emphasize that this is a deal-breaker for my organization using this for the time being. I would imagine I'm not the only one as other organizations are using 3-4 digit extensions that would be affected by this in their direct routing scenarios.