Cisco Cisco IOS Software Release 12.4(6)T

ANS tone—answer tone. Also called CED tone. A 2100-Hz tone used to disable echo suppression for 
data transmission.

ANSam—A modified answer tone sent by V.8-capable equipment.

CM—call menu signal. A V.8 signal transmitted from the call DCE to indicate modulation modes 
available in the call DCE. CM consists of a repeating sequence of bits, modulated using V.21 low-band 
channel. See joint menu signal (JM).

DSMP—distributed stream media processor. The software component that controls the DSP on behalf 
of the media service provider that handles conference calls. The DSMP also manages packet 
transmission and reception in fast switching.

HPI—host port interface. The interface used to communicate with TI DSPs.

JM—joint menu signal. A V.8 signal transmitted from the answer DCE to indicate modulation modes 
available jointly in the call and answer DCEs. JM consists of a repeating sequence of bits, modulated 
using V.21 high-band channel. See call menu signal (CM).

TDD—telecommunication device for the deaf. Phones that enable those who are deaf, hard of hearing, 
or speech-impaired to communicate over TDM. See TTY.

text relay—Text payload that is encapsulated into RTP packets with a negotiated payload type and sent 
over an IP network as part of a voice call. Text relay is controlled by the voice gateways.

ToIP—Text over IP. The transport of analog modulated signals generated by PSTN text telephones over 
an IP Network.

TTY—text telephones or teletype phones. Phones that enable those who are deaf, hard of hearing, or 
speech-impaired to communicate over TDM. See TDD.

Refer to 

 for terms not included in this glossary.

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