B757-200
Communication Breakdown
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Overcame Equipment Problem; Flight Crew Took Evasive Action
Company Policy; Equipment / Tooling
Flight sent me a message requesting a phone patch with Dispatch and Maintenance. Per the SELCAL command; I was to use [a specific] frequency. I attempted to call that number in the new digital phone system and the patch would not connect. The phone rang like nobody was home. I disconnected and tried again with the same result. I tried 3 times without success. I sent an ACARS to the flight asking them to contact Commercial Radio and contact me via them. At that point; patch with Dispatch and Maintenance worked fine.
A Dispatcher was unable to contact a Company aircraft using the new digital phone system after the crew requested a Dispatch/Maintenance phone patch.