UPDATE 1:45PM: The issue is resolved and calls are routing properly now.
The phone extention 41919 is not currently reachable from Netphones. Callers are getting a message that calls cannot be accepted. Dialing the 10 digits (212-854-1919) is working properly.
The issue is being looked at by CUIT Engineers. We apologize for this service interruption.
For a complete list of recent and upcoming scheduled service changes, please visit http://cuitalerts.columbia.edu/.