Cisco IOS Release 12.1(5)T

• Closed User Group Selection Facility Suppress Option

• Configuring an ISDN BRI NT/TE Interface on Voice Interface Cards and ISDN BRI Voice Modules

• IGMP Version 3

• Interface Index Persistence

• Interface Range Specification

• MSDP MIB

• Multimedia Conference Manager with Voice Gateway Image with RSVP to ATM SVC Mapping

• NAT-Support of H.323 v2 Call Signalling (FastConnect)

• NAT-Support of IP Phone to Cisco CallManager

• Parser Cache

• RSVP Support for Frame Relay

• UDLR Tunnel ARP and IGMP Proxy