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Aastra 6757i CT / 57i CT
Brand New Includes One Year Warranty
No Longer Manufactured
Item # A1758-0131-10-01
  • 2.4GHz Corded / Cordless VoIP Phone
  • Up To 300,000ft Range
  • Voice Over Internet Protocol (VoIP)
  • Session Initiation Protocol (SIP)
  • Built-In HTTP Server
  • XML Browser
  • Up to 9 Call Appearance Lines
  • Caller ID / Call Waiting
  • Expandable Up To 4 Handsets
  • Digital Duplex Speakerphone
  • 144x128 Graphical LCD Display
  • Wall Mountable/Mount Included
  • Hi-Q™ Audio Technology

Aastra 6757i CT / 57i CT Includes:
  • 1 Corded Base
  • 1 Cordless Handset / Charger
**Requires A Broadband Internet Connection & Does Not Operate On A Regular (Analog) Phone Line**

Add Extended Warranty (More Info)

Aastra 6757i CT / 57i CT
Brand New Includes One Year Warranty
Item # A1758-0131-10-01
The Aastra 6757i CT offers powerful features and flexibility in a standards based, carrier-grade advanced level expandable IP telephone. With a sleek, elegant design and large 144 x 128 pixel graphical LCD display, the 57i is fully interoperable with leading IP Telephony platforms.

This system offers advanced XML capability to access custom applications and support up to 9 calls simultaneously.

Phone Facts 101:
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6757i CT Features:
  • 2.4GHz Corded / Cordless VoIP Phone
  • Up To 300,000ft Range
  • Digital FHSS Technology
  • Voice Over Internet Protocol (VoIP)
  • Session Initiation Protocol (SIP)
  • XML Browser
  • Up to 9 Call Appearance Lines
  • Caller ID / Call Waiting
  • Modular Headset Connector With Built-In Amplifier
  • Expandable Up To 4 Handsets
  • Hearing Aid Compatible
  • Digital Duplex Speakerphone
  • 144x128 Graphical LCD Display
    Soft White Backlight For User Comfort In Any Lighting Environment
  • LED For Call & Message Waiting Indicator
  • Phone Directory / Dialer
  • Call Log
  • 3-Way Conferencing
  • Call Forwarding
  • Missed Call Indicator
  • Wall Mountable/Mount Included
  • Intercom
  • Call Transfer
  • Paging Key
  • Auto Answer
  • Redial
  • Live Dialpad Option
  • Date / Time Display
  • Do Not Disturb
  • Call Timer
  • AC Powered (Adapter Included)
  • Integrated IEEE 802.3af
    Power Over Ethernet (PoE) Support
  • Modular Headset Connection for Base
    2.5mm Connection for Handset
  • Belt Clip - Included w/ Brand New Models
  • Multilingual Menu Support (English, French, Spanish, Italian, & German)
  • Hi-Q™ Audio Technology
  • Distinctive Ringing
  • Multi-Proxy Support
  • Busy Lamp Field


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 6757i CT IP Phone requires the following environment:
  • SIP-based IP PBX system or network installed and running with a SIP account created for the 6757i 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).


Expansion Phone Modules: