: Full support for IP telephony features, including Cisco Unified Communications Manager Express (CME) and Survivable Remote Site Telephony (SRST). Multiprotocol Label Switching (MPLS)
: Optional Power over Ethernet (PoE) support for devices like IP phones. Understanding the Filename Release Notes for Cisco IOS Release 15.3M&T c2800nm adventerprisek9 mz 152 1 full