Cisco IOS Release 12.1X

• Call Tracker plus ISDN and AAA Enhancements for the Cisco AS5300 and Cisco AS5800

• Interworking Signaling Enhancements for H.323 and SIP VoIP

• Network Side ISDN PRI Signalling, Trunking, and Switching

• PIAFS Wireless Data Protocol for MICA Modems

• VoIP Call Admission Control Using RSVP