atcomsystems.ca/forum Forums Other TDM Phone Systems Other Telephones & Systems Now work with an AT&T 5ESS

On the DMS side of the aisle, Ribbon is using the C15 and C20 softswitches. We collapsed two DMS10 switches into a single C15. The nice thing is the C15 is capable of still supporting the DMS's LCE line bays. Same with those still using GR303. We are in the process of migrating to SIP, but the C15/C20 will still handle TDM.