Key Features:

• The 53i from Aastra offers powerful features and flexibility in a standards based, carrier-grade basic level IP telephone. With a sleek and elegant design and 3 line LCD display, the 53i is fully interoperable with leading IP Telephony platforms, offering advanced XML capability to access custom applications and support for up to 9 calls simultaneously. Part of the Aastra family of IP telephones, the 53i is ideally suited for light to regular telephone requirements.
• Mfr. Part #: A1753-0131-10-01
• Full duplex speakerphone
• Up to 9 call appearance lines
• Shared call and bridged line appearances
• Multi-proxy support
• Distinctive ringing, priority alerting
• XML browser
• Personal directory
• Call forward/Call transfer/Call waiting
• Caller and calling line information
• Callers log
• Local 3-way conference
• Intercom with auto-answer
• Redial list
• Do Not Disturb
• Live dial pad or pre-dial support
• Digium's Asterisk Business Edition supports Busy Lamp Field (BLF), Bridged Line Appearances (BLA), Intercom
• BroadSoft's BroadWorks enhanced SIP- supports Shared Call Appearances, Busy Lamp Field (BLF), CommPilot Call Manager
• Nortel's MCS 5100/5200 SIP supports Conferencing, Voicemail, and NAT Traversal
• Sylantro's SIP -supports Bridged Line Appearances (BLA), Call Park/Pickup, Conference