Avaya Communication Manager Administrator's Manual page 1745

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Dial tone
switch. This indicates that the terminatingserver or switch is ready to receive digits.
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Wink start
the originating server/switch. This indicates that the terminating server/switch is ready to receive
digits.
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Delay dial
followed by an on-hook signal) to the originating server. This indicates that the terminating
server/switch is ready to receive digits.
Types of address transmission
In addition to seizure and start dial signals, media servers or switches have to transmit the digits and
characters for telephone numbers. This is called address transmission. Three types of signaling are
available:
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Dial Pulse (DP) addressing
interruptions of a direct or alternating current at the sending end. The number of interruptions
corresponds to the value of a digit or character (alternating current is not used by media servers or
switches). The interruptions usually are produced by a rotary telephone dial, or may be produced
by a sender within a switching system.
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Dual Tone Multifrequency (DTMF) addressing
known as touch-tone) that consist of two, simultaneous, dialing signals. One tone is from a low
group of four frequencies. The other tone is from a high group of four frequencies. Both tones
correspond to digits, letters, or characters (0–9, A–Y, or * and #). One of the tones (1,633 Hz)
from the high group is a spare.
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Multifrequency (MF) addressing
frequencies out of 6 to represent 10 decimal digits (0– 9) and 5 auxiliary signals. MF signals are
used for called number addressing, calling number identification. They also report whether the far
end is ringing or busy.
Analog vs. digital trunks
Analog trunks carry voice and voiceband data communication. "Voice" means that sound of any kind is
transformed into electrical waveforms and transmitted within an approximate bandwidth of 300 Hz to
3,400 Hz. "Voiceband data" means that data is transmitted within the voiceband and requires a
conversion resource (modem) at both ends of the connection. The data-transmission rate for analog
trunks depends on the data-handling capability of the modems in the connection.
Digital trunks represent both sound and data as 0's and 1's and can be configured to carry any kind of
voice or data traffic. Digital trunks connect to a DS1 circuit pack and provide a T1 or E1 carrier. DS1
service provides an interface for CO, FX, DID, tie, and WATS trunks. The DS1 interface supports
incoming and outgoing dial types of ground-start, loop-start, auto/auto, auto/delay, auto/immed, and
auto/wink. Signaling may be robbed-bit or common-channel depending on the trunk type and whether the
dial-type is incoming or outgoing. The interface may be used to connect the server running
Communication Manager to a toll office directly using wink-start tie trunks for two-way access to the toll
network.
Administrator's Guide for Avaya Communication Manager
November 2003
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The terminating server or switch sends precise dial tone to the originating server or
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The terminating server/switch sends a wink start (momentary off-hook) signal to
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The terminating server/switch sends a delay dial signal (an off-hook signal
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A method of signaling that consists of regular momentary
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Signaling arrangements (commonly
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Signaling arrangements that make use of only 2
Feature Reference
Trunks and trunk groups
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