Datasheet
Data Sheet
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Supplementary services
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Caller ID
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Call-waiting caller ID
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Voice-mail indication
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Conference call
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Call waiting
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Call forwarding
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Calling-line identification
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Unattended transfer
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Attended transfer
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Shared line
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Speed dial
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Meet me
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Pick up
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Redial
Other supported protocols
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IEEE 802.1Q VLAN tagging
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Cisco Discovery Protocol
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DNS
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DHCP
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Internet Control Message Protocol (ICMP)
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IP
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Real-Time Transport Protocol (RTP)
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TCP
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Trivial File Transfer Protocol (TFTP)
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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:
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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.
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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.
Note: Success of fax transmission depends on network conditions and the fax modem response to these
conditions. The network must have reasonably low network jitter, network delay, and packet loss rate.
Voice codecs supported
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G.711µ-law
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G.711A-law
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G.729
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G.729A
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G.729B
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G.729AB
SRTP/TLS
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SRTP secures voice conversations on the network and provides protection against replay attacks.
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TLS is a cryptographic protocol that secures data communications such as email on the Internet. TLS is
functionally equivalent to SSL.
VoIP specifications
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LAN port: One RJ-45 10/100BASE-T Fast Ethernet port
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Quality of service (QoS): Precedence setting and differentiated services code point (DSCP)
Call progress tones Configurable based on network locale
Line-echo cancellation
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Echo canceller for each port
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8-millisecond (ms) echo length
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Nonlinear echo suppression (echo return loss [ERL] greater than 28 dB for f = 300 to 3400 Hz)