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Aastra 6757i CT VoIP Phone 4 Lines + Wireless Handset - Response Point (6757i-CT-RP) New


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Quick Overview

Aastra 6757i-CT IP Phone
Includes Wireless Handset
4 Lines
2 Ethernet Ports
Power over Ethernet 802.3af

Response Point

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Manufacturer Discontinued

Aastra 6757i-CT IP Phone (Response Point Version)
Includes Wireless Handset
4 Lines
2 Ethernet Ports
Power over Ethernet (IEEE 802.3af)
Response Point

Product Description Aastra 6757i-CT

* The 6757i and the 57i are identical phones, Aastra added the "67" to the model number to have uniform product codes. This is a model number change only, the features are identical.

Aastra 57i-CT is an executive IP phone with the best mobility and expandability of any current IP phone. The 57i-CT includes one wireless handset but can grow to four wireless handsets.The wireless handsets are 1.9GHz not WiFi so no additional wireless infrastructure is necessary. Perfect for a busy executive, office manager or secretary the Aastra 57i-CT can be used with the Aastra 536M and 560M expansion modules for additional line keys. 

The 57i-CT has a good build quality and is in a league of its own in the high end VoIP handset market.

An exeptional product from the Aastra 5i series IP phones. The Aastra 57i CT is a standards based, carrier grade advanced level, expandable, IP telephone that offers powerful features and flexibility and also includes an integrated WDCT cordless mobility handset for coverage up to 300,000 sq ft.* This phone is made for the people who require mobility at business. It has the new sleek and elegant design of the Aastra 5i series phones. The Aastra 57i CT features a large 144 x 128 pixel graphical backlit LCD display and 6 dynamic context sensitive softkeys, the Aastra 57i CT base unit is fully interoperable with leading IP Telephony platforms, and offers advanced XML capability to access custom applications.

The Aastra 57i CT can support up to 9 calls simultaneously, so you never miss important calls. Aastra 57i CT s a part of the Aastra 5i Series of IP telephones, and is ideally suited for executives, heavy telephone users whod require more one touch feature keys and a large screen to take full advantage of XML based programs and mobile warehouse, support and retail staff. Mobility, business requirements, technology, flexibility the Aastra 57i takes care of it all.

The Aastra 57i-CT is expandable with either the 536M expansion module or the 560M expansion module. The 536M includes 36 additional line keys and a paper insert to mark the keys. The 560M adds an additional 60 keys with its LCD display.

Key Features and Benefits of the Aastra 57i-CT:

The Aastra 57i CT employs secure WDCT cordless technology that expands VoIP beyond the desktop without the need for a separate wireless network. Aastra 57i CT increases the flexibility and efficiency for those not tied to a desk.

XML Browser
The Aastra 57i CT is equipped with XML browser capabilities and an extra large display with dynamic softkeys to easily access customized services and applications. Aastra 57i CT allows you to create internal service applications using development guides available from Aastra. With this feature, you can customize the Aastra 57i CT to meet your specific business needs or vertical applications using the display and keypad.

Enhanced Call Management
The Aastra 57i CT features extensive storage capacity for personal directories, caller logs and redial lists with 12 programable keys. The Aastra 57i CT can improve efficiency by providing more call information with the push of a button. The Aastra 57i CT also features shared call and bridged line appearances, call forward, call transfer, call waiting, intercom and local 3-way conference which increases call flexibility and control.

The Aastra 57i CT offers two different module extension options. Three Aastra 536M modules are supported, each offering 36 keys with LED indicators. This creates a feature rich attendant console on the Aastra 57i CT. It will also support up to three of the advanced Aastra 560M modules, each offering 60 keys with a screen based LCD display and LED system.

Remarkable Audio
All Aastra IP telephones offer full-duplex speakerphone with excellent voice clarity and delivery and the Aastra 57i CT is no different. With years of experience in telecommunications and telephone design, Aastra can ensure superior voice quality on every product we sell.

Simplified Deployment
From initial deployment and configuration to future enhancements and upgrades, the Aastra 57i CT, like other Aastra family of IP telephones, are designed to save your business time and money. Dual auto-sensing switched Ethernet ports eliminate additional wiring and simplify installations of the Aastra 57i CT. Integrated IEEE 802.3af Power-over-Ethernet allows easy deployment with centralized powering and backup. Aastra 57i CT helps you create easy configuration files, which by using any text editor, can be used to configure phones individually or centrally.

* Range capacity subject to operating environment

Feature Highlights*
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

Digiums Asterisk Business Edition
supports Busy Lamp Field (BLF), Bridged Line Appearances (BLA), Intercom

BroadSofts BroadWorks enhanced SIP
supports Shared Call Appearances, Busy Lamp Field (BLF), CommPilot Call Manager

Nortels MCS 5100/5200 SIP supports Conferencing, Voicemail, and NAT Traversal

Sylantros SIP
supports Bridged Line Appearances (BLA), ComCierge, Call Park/Pickup, Conference

* Feature availability dependant on IP telephony systems

Aastra 57i CT Technical Specifications


57i CT
57i CT Base 20.8 cm W x 23.5 cm D x 8.0 cm H
(8.2W 9.3D x 3.2H)
895 g (31.3 oz)
4 positions footstand
Wall mountable

57i CT Cordless Handset
13.7 cm L x 4.6 cm W x 1.9cm H
(5.4L x 1.8W x 0.8H)
133 g (4.7 oz.)


57i CT Base
AC wall adapter included
Integrated IEEE 802.3af Power Over Ethernet (PoE) support

57i CT Cordless Handset
AC wall adapter for charging stand
Nickel Metal Hydride battery 4 day standby time, 4 hour talktime


57i CT Base
Hearing aid compatible (HAC) handset
Full-duplex quality speakerphone
Modular headset connector with built-in amplifier
Non-amplified business headsets are recommended

57i CT Cordless Handset
One handset included; expandable up to 4 handsets
2.4 GHz Frequency Hopped Spread Spectrum (FHSS)
Warehouse coverage up to 300,000 sq. feet
Vibration alerter
2.5mm headset connector

Feature Keys

57i CT Base
4 call appearance lines with LEDs
4 navigational keys
12 customizable softkeys with LEDs, programmable up to 30 functions
8 predefined hard keys
-Speakerphone/Headset toggle
-2 volume keys

57i CT Cordless Handset
2 context-sensitive softkeys
8 predefined hard keys
-2 volume keys
Programmable function key supports up to 20 functions for tight integration to the 57i CT base features

User and administrator level passwords
Encryption of configuration files
HTTPS configuration download and web management
Phone lock with PIN

Multi-lingual support English, French, Spanish, Italian, German
Downloadable language pack support for customization and additional language translations
Country-specific call progress tones and cadences

Protocols / Codecs
IETF SIP (RFC3261 and associated RFCs)
G.711 μ-law / A-law

Visit for an up to date listing of approved vendor / interoperability

Display and Indicator

57i CT Base
144x128 pixels graphical LCD display Soft white backlight for user comfort in any lighting environment
Configurable for Always On, Always Off, or Auto (power saving) LED for call and message waiting indicator

57i CT Cordless Handset
Large 5 lines backlit display
LED for call and message waiting indicator

Expansion Module
Aastra 536M 36-keys paper label module with LEDs
Scalable up to 3 modules or 108 keys.
No additional external power required; direct power from phone

Aastra 560M 60-keys LCD module with LEDs
Scalable up to 3 modules or 180 keys. No additional external power required;
direct power from phone

Dual 10/100 Mbps switched Ethernet ports
Manual or Dynamic Host Configuration Protocol (DHCP) IP address setup
Time and date synchronization using SNTP
Quality of Service (QOS) support
IEEE 802.1p/Q VLAN and priority tagging, Type of Services (TOS), and Differentiated Services Code Point
Network Address Translation (NAT) support
Integrated HTTP/HTTPS server for web administration and maintenance including a built-in troubleshooting section
Mass deployment via central provisioning of user configuration files TFTP, FTP, HTTP, HTTPS
Redundant server support
-Local backup registrar and/or proxy server

Part Numbers
A1758-0131-10-05 North America (120V power adapter)

Package Contents

57i CT Base
Aastra 57i CT IP telephone
Handset and coil cord
2x Footstand
AC wall adapter for base phone
Network cable
Installation Guide
Wall mount kit

57i CT Cordless Handset
Aastra 57i CT cordless handset
NiMH battery
Charging stand
AC wall adapter for charging stand
Belt clip

WEEE (2002/96/EC)
FCC Part 15 Class B
ICES-003 Class B
VCCI Class B
AS/NZS 3548 Class B
EN55022 Class B
CISPR22 Class B
EN61000-4-2, 4-3, 4-4, 4-5, 4-6, 4-8, 4-11

CAN/CSA C22.2 No. 60950
EN 60950
UL 60950-1

FCC Part 68 (Hearing Aid Compatibility)

FCC Part 15 Class C
AS/NZS 4771

Aastra 536M 36-keys paper label expansion module
-A1736-0000-10-55 (Universal)

Aastra 560M 60-keys LCD expansion module
-A1760-0000-10-55 (Universal)

Aastra 57i CT cordless handset kit
-A1759-0000-10-05 North America (120V power adapter)

Optional midspan Power Over Ethernet (POE) injector available, but not provided, for networks that do not supply power
-D0023-0031-00-00 (North America)

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