Physical
57i CT Base
» 23.5 cm W x 20.8 cm D x 8.0 cm H (9.3”W x 8.2”D x 3.2”H)
» 940 g (33.0 oz)
» 4 positions footstand
» Wall mountable
57i CT Cordless Handset
» 13.7 cm L x 4.6 cm W x 1.9cm H (5.4’’L x 1.8’’W x 0.8’’H)
» 133 g (4.7 oz.)

Power
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

Audio
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
- Goodbye, Options, Hold, Redial, Speakerphone/Headset toggle, Mute, 2 volume keys
57i CT Cordless Handset
» 2 context-sensitive softkeys
» 8 predefined hard keys
- Goodbye, Hold, Mute, Redial, Function, Menu, 2 volume keys
- Programmable function key supports up to 20 functions for tight integration to the 57i CT base features

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

Localization
» 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
» G.729

Interoperability
» Visit www.aastratelecom.com/IPphones 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

Networking
» 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 802.1 p/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
- DNS-SRV
- 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

Regulatory
» WEEE (2002/96/EC)
EMC
» FCC Part 15 Class B
» ICES-003 Class B
» VCCI Class B
» AS/NZS 3548 Class B
» EN55022 Class B
» CISPR22 Class B
» EN55024
» EN61000-4-2, 4-3, 4-4, 4-5, 4-6, 4-8, 4-11
Safety
» CAN/CSA C22.2 No. 60950
» EN 60950
» UL 60950-1
Telecom
» FCC Part 68 (Hearing Aid Compatibility)
» AS/NZS S004
RF
» FCC Part 15 Class C
» AS/NZS 4771

Accessories
» 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)