Adaptor CISCO ATA187-I1-A= Analog Telephone 240v RJ11


Adaptor CISCO ATA187-I1-A= Analog Telephone 240v RJ11

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Adaptor CISCO ATA187-I1-A= Analog Telephone 240v RJ11
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The Cisco®


ATA 187 Analog Telephone Adaptor is a handset-to-Ethernet adaptor that turns traditional telephone devices into IP devices. Customers can take advantage of the many new and exciting IP telephony applications by connecting their analog devices to Cisco ATAs.

Physical Specifications


Power supply: Universal AC power supply 100 and 240V

Power adaptor output voltage: +12.0 VDC at 1A maximum

Noise level

Less than 34 dBA at 3 feet


2 RJ 11


Operating temperature: 23 to 113°F (5 to 45 °C)

Non-operating temperature: -13 to 158ºF (-25 to 70ºC)


Operating humidity: 5 to 95% noncondensing

Mean time between failure (MTBF)

100,000 hours

Physical dimensions

(H x W x D) and weight

Dimensions: 1.5 x 5.4 x 6.7 in. (3.8 x 13.7 x 17.0 cm)

Weight: 9.2 oz (260g)


RoHS- and WEEE-compliant materials

On-off switch

To turn device on and off

Software Specifications

Cisco ATA SIP services

• IP address assignment: Provided by DHCP or statically configured
• Cisco ATA configuration through Cisco UCM configuration interface
• VLAN configuration
• Cisco Discovery Protocol
• Low-bit-rate codec selection
• User authentication
• Configurable tones (dial tone, busy tone, alert tone, reorder tone, and call-waiting tone)
• Dial plans
• SIP proxy server redundancy
• Privacy features
• Domain Name System (DNS) service (SRV) support
• User-configurable, call waiting; permanent default setting
• Comfort noise during silence period when using G.711
• Advanced audio mode
• Caller ID format
• Ring cadence format
• Silence suppression
• Hook-flash detection timing configuration
• Configurable on-hook delay
• Type of service (ToS) configuration for audio and signaling Ethernet packets
• Debugging and diagnostic tools

SIP services

Cisco ATA supports the methods listed here (for more information, refer to RFC-3261):


Supplementary services

• Caller ID
• Call-waiting caller ID
• Voice-mail indication
• Conference call
• Call waiting
• Call forwarding
• Calling-line identification
• Unattended transfer
• Attended transfer
• Shared line
• Speed dial
• Meet me
• Pick up
• Redial

Other supported protocols

• IEEE 802.1Q VLAN tagging
• Cisco Discovery Protocol
• Internet Control Message Protocol (ICMP)
• IP
• Real-Time Transport Protocol (RTP)
• Trivial File Transfer Protocol (TFTP)
• User Datagram Protocol (UDP)

Fax services

The Cisco ATA supports two modes of fax services, in which fax signals are transmitted using the G.711 codec:

• Fax pass-through mode: The mode enables receiver-side called-station-identification (CED) tone detection with automatic G.711A-law or G.711μ-law switching.
• T38 fax relay mode: The T.38 fax relay feature enables devices to use fax machines to send files over the IP network. In general, when a fax is received, it is converted to an image, sent to the T.38 fax device, and converted back to an analog fax signal. T.38 fax relays configured with voice gateways decode or demodulate the fax signals before they are transported over IP.

Voice codecs supported

• G.711μ-law
• G.711A-law
• G.729
• G.729A
• G.729B
• G.729AB


• SRTP secures voice conversations on the network and provides protection against replay attacks.
• TLS is a cryptographic protocol that secures data communications such as email on the Internet. TLS is functionally equivalent to SSL.


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