June 2005
Intermediate to advanced
502 pages
21h 48m
English
Content preview from Switching to VoIP
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regional Bell operating company (RBOC)
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450 | Glossary
media channels on a converged network.
One such standard is RSVP.
regional Bell operating company (RBOC)
An American local telephone company
that was born from the breakup of AT&T
in 1983, also called ILEC.
Resource Reservation Protocol (RSVP)
An IETF QoS standard for bandwidth
control on wide area routed networks.
response
In SIP terms, a message from a SIP server
agent to a SIP user agent, usually in
response to a method. See also method.
robbed-bit signaling
The nickname for in-band signaling on T1
circuits, which is rarely used for new voice
applications today.
rollover group
A trunk group that can receive many
simultaneous calls destined for the same
phone number. See also trunk group, hunt
group.
sampling
The process wherein sound waveform
amplitudes are quantified by digital or
analog means; for example, graphing
points on a sound wave. Sampling is the
first step in pulse code modulation
(PCM).
secure RTP (SRTP)
A protocol for encrypting RTP media
payloads.
Session Description Protocol (SDP)
A simple mechanism used by SIP end-
points to communicate their capabilities
during call setup.
Session Initialization Protocol (SIP)
An IETF protocol for enabling telephony,
media delivery, and instant messaging
applications on IP networks.
side-tone
The sound
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