Aastra Voice Over IP Phones Voice Over IP Phones
UserControls/ 53i

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$165.99
Aastra 53i
Includes One Year Manufacturer's Warranty
Item #A1753-0131-10-05
  • Corded Voice Over IP Phone
  • Voice Over Internet Protocol (VoIP)
  • Session Initiation Protocol (SIP)
    Enabler Protocol for Telephony & Voice Over IP (VoIP) Services
  • Up to 9 Call Appearance Lines
  • Caller ID / Call Waiting
  • Hearing Aid Compatible
  • Wall Mountable
  • Digital Duplex Speakerphone
  • Modular Headset Connector With Built-In Amplifier
  • 3-Line LCD Display
  • 3-Way Conferencing
  • LED For Call & Message Waiting Indicator
  • Phone Directory / Dialer
  • Call Forwarding
  • Intercom
  • Call Transfer
  • Redial
  • Date / Time Display
  • Do Not Disturb
  • AC Powered (Adapter Included)
  • Integrated IEEE 802.3af
    Power Over Ethernet (PoE) Support
  • Multilingual Menu Support (English, French, Spanish, Italian, & German)


VoIP Features:
  • Dual 10/100 Mbps Switched Ethernet Ports
  • Manual or DHCP IP Address Setup
  • Time / Date Synch Using SNTP
  • NAT, QOS, TOS, & Differentiated Services Code Point
  • Built-In HTTP/HTTPS Server
    For Web Administration & Maintenance
  • Voice Codec Support: G.711 µ-law / A-law, G.729
  • Protocols: IETF SIP (RFC3261 & Associated RFCs)


The 53i CT IP Phone requires the following environment:
  • SIP-based IP PBX system or network installed and running with a SIP account created for the 53i phone.
  • Access to a Trivial File Transfer Protocol (TFTP), File Transfer Protocol (FTP), Hypertext Transfer Protocol (HTTP) server, or Hyper Text Transfer Protocol over Secure Sockets Layer (SSL) (HTTPS).
  • 802.3af Ethernet/Fast Ethernet LAN
  • Category 5/5e Straight Through Cabling
  • Power over Ethernet (PoE) Inline Power Injector (Optional Accessory - Necessary Only if Your Network Provides No Inline Power & if You Do Not Use the IP Phone’s Power Adapter).

The Aastra 53i 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 5i Series of IP telephones, the 53i is ideally suited for light to regular telephone requirements.

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