In-band signaling - Factbites

In-band signaling - Factbites
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Topic: In-band signaling

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	Out-of-band signaling - Wikipedia, the free encyclopedia
		Signaling that uses a portion of the channel bandwidth provided by the transmission medium, e.g.
		Note: Out-of-band signaling results in a lowered high-frequency cutoff of the effective available bandwidth.
		In telecommunications, the term out-of-band signaling has the following meanings:
	en.wikipedia.org /wiki/Out-of-band_signaling (114 words)

	The Current Technology Status of Signaling
		TR303 signaling is a hybrid of in-band and out of band signaling.
		Out of band signaling is used to convey off hook from the home to the local switch, and to set up a connection from the home to the local switch.
		This is primarily out of band signaling, and is packet based.
	www.jrt-limited.com /sig.htm (1072 words)

	Out-of-Band Signaling [Active Directory]
		Out-of-band signaling is most effective when used in combination with a versioning mechanism—this allows the partner detecting the change to notify remote partners what version of the shared data to wait for.
		Applications that require identical policies to be in force in order to communicate with each other can use out-of-band signaling to ensure that a new policy is not employed until all involved parties have received it.
		Cooperating applications that share common data using the directory can use out-of-band signaling to avoid both version skew and partial updates.
	msdn.microsoft.com /library/en-us/ad/ad/out-of-band_signaling.asp?... (223 words)

	What is SS7
		In-band signaling requires separate signaling facilities for each user circuit, while a signle out-of-band signaling can support many user circuits.
		First, long-distance bandwidth is conserved since signaling is out of band and signaling for several trunks can be multi-plexed on a signal signaling channel.
		Network signals shared the same physical channel as the call that was being established and were carried with in the user's 300 to 3400-Hz voiceband.
	www.pulsewan.com /data101/ss7_basics.htm (4984 words)

	View Out of Band Signaling
		Out-of-band signaling is a method of transmitting telephone control signals on a separate channel from the content (or "traffic") signals.
		Early signaling systems carried the control signals on the same circuit as the user traffic; for example, the older in-band analog systems use this approach.
		Some people call this approach out-of-band signaling and it is preferred to in-band signaling because it is more efficient and robust.
	www.creativyst.com /cgi-bin/M/Glos/st/Glossary.pl?Edit=outofbandsignaling (207 words)

	out-of-band signaling - Glossary - CNET.com
		The existence of this separate telephone network intended specifically for call signaling is called "out-of-band." In other words, the call signaling is done independently of the data-carrying B channels, which allows them to utilize their full 64-kbps bandwidth capability.
		ISDN normally uses a separate wire called the D channel to do all the call setup and signaling.
	www.cnet.com /Resources/Info/Glossary/Terms/outofbandsignaling.html (57 words)

	TCP urgent data: in-band or out-of-band?
		On one hand, urgent data is in-band in the sense that it is delivered in sequence.
		On the other hand, urgent data is out-of-band in the sense that the application is informed of its arrival before the application reaches the point at which urgent data occupies the stream.
		As you observe, there are two concepts: 1) Out-of-band signalling (i.e., control) 2) Out-of-band data TCP is a data-transport protocol that does not offer signalling.
	www.listproc.bucknell.edu /archives/netbook/200104/msg00003.html (442 words)

	Detectors, Generators and Timers
		This signaling is either the physical out-of-band signal bits of digital protocols or relates to the control of analog interface boards.
		Pulses an out-of-band signaling pattern for a duration.
		For example, all Channel Associated Signaling (CAS) protocols reserve out-of-band signaling and some AG Access functions may not be available.
	www.nmscommunications.com /manuals/6198-10/chap69.htm (195 words)

	Intel(R) White Papers - Fax and ISDN
		The D channel, on the other hand, is used only for packet-switched data services and for out-of-band signaling; its bandwidth is 16 Kb/s for BRI and 64 Kb/s for PRI.
		The out-of-band signaling employed in ISDN to manage its call control permits its many unique functions and capabilities.
		The signaling information in the analog world is passed through the same channel that is handling the call.
	www.intel.com /network/csp/resources/white_papers/isdnfax.htm (3006 words)

	Configuring Channelized E1 & T1
		Robbed-bit signaling, which uses bits from specified frames in the user data channel for signaling, fits into the in-band signaling category.
		Channel-associated signaling is call signaling that is configured on an E1 controller and enables the access server to send or receive analog calls.
		The terms in-band and out-of-band indicate whether various signals—used to set up, control, and terminate calls—travel in the same channel (or band) with users' voice calls or data, or whether those signals travel a separate channel (or band).
	www.cisco.com /univercd/cc/td/doc/product/software/ios120/12cgcr/dial_c/dcchant.htm (7409 words)

	SS7 Tutorial by Performance Technologies
		Signaling links are logically organized by link type ("A" through "F") according to their use in the SS7 signaling network.
		Signaling gateways can be configured as an STP or SEP (Signaling End Point).
		Point codes are carried in signaling messages exchanged between signaling points to identify the source and destination of each message.
	www.pt.com /tutorials/ss7 (932 words)

	Out-of-band signaling (from telephone and telephone system) -- Encyclopædia Britannica
		More results on "Out-of-band signaling (from telephone and telephone system)" when you join.
		More from Britannica on "Out-of-band signaling (from telephone and telephone system)"...
		A band, as the term is most broadly understood, is one of two principal types: the marching band and the concert band.
	www.britannica.com /eb/article-76197?tocId=76197 (865 words)

	in-band signaling - Glossary - CNET.com
		For Basic Rate Interface (BRI) service, this means that each B channels is limited to 56 kbps throughput (instead of 64 kbps with out-of-band signaling).
		In some locations, this third wire isn't available, and bandwidth must be "borrowed" from the other two data-carrying B channels.
		ISDN normally uses a separate wire called the D channel to set up calls and handle their signals.
	www.cnet.com /Resources/Info/Glossary/Terms/inbandsignaling.html (63 words)

	out-of-band signaling - a Whatis.com definition
		Out-of-band signaling is telecommunication signaling (exchange of information in order to control a telephone call) that is done on a channel that is dedicated for the purpose and separate from the channels used for the telephone call.
		Out-of-band signaling is used in Signaling System 7 (SS7), the latest standard for the signaling that controls the world's phone calls.
		For more information, see WebProForum's Signaling System 7 Tutorial.
	searchnetworking.techtarget.com /sDefinition/0,,sid7_gci214369,00.html (119 words)

	SS7 (Signaling System 7): Teledatacom Glossary
		Historically, the signaling for a telephone call has used the same voice circuit that the telephone call traveled on (this is known as in-band signaling).
		SS7 uses what is called out-of-band signaling, meaning that signaling (control) information travels on a separate, dedicated 56 or 64 Kbps channel rather than within the same channel as the telephone call.
		On the public switched telephone network (PSTN), Signaling System 7 (SS7) is a system that puts the information required to set up and manage telephone calls in a separate network rather than within the same network that the telephone call is made on.
	www.artesyncp.com /resources/glossary/ss7.html (157 words)

	2600 - a Whatis.com definition
		Prior to widespread use of out-of-band signaling, AT&T used in-band signaling, meaning that signals about telephone connections were transmitted on the same line as the voice conversations.
		Today, long-distance companies use Signaling System 7, which puts all channel signals on a separate signaling channel, making it more difficult to break into the phone system.
		Since no signal at all on a line could indicate a pause in a voice conversation, some other way was needed for the phone company to know when a line was free for use.
	whatis.techtarget.com /definition/0,,sid9_gci211496,00.html (317 words)

	[NSIS] Cases that can benefit from the out of band NSIS signaling
		I want to be clear: I am not advocating out of band NSIS signaling (that requires some sort of discovery of your signaling peers) as the only option.
		I just argue the value to the support NSIS out of band signaling option as well.
		Cases that can benefit from the out of band NSIS signaling.
	www.ietf.org /mail-archive/web/nsis/current/msg01424.html (246 words)

	signaling - a Whatis.com definition
		In in-band signaling, the signaling is on the same channel as the telephone call.
		In out-of-band signaling, signaling is on separate channels dedicated for the purpose.
		In telephony, signaling is the exchange of information between involved points in the network that sets up, controls, and terminates each telephone call.
	whatis.techtarget.com /definition/0,,sid9_gci214370,00.html (94 words)

	Hill Associates - Live E-Learn Course Description
		The course explores the concept of in-band signaling and the need for out-of-band signaling.
		Signaling System 7 (SS7) is the spinal cord for the public switched telephone network (PSTN).
		A fundamental knowledge of telephone signaling would be helpful.
	www.hill.com /training/live_elearn/course.asp?track=essentials&course=CD_9029 (256 words)

	Out-of-Band Signaling
		An example of out-of-band signaling is the CCITT R-2 line signaling.
		Next: Noncompelled versus compelled signaling Up: AC Signaling Previous: In-band Signaling
		It could be costly because of the extra supervisory signaling equipment required.
	poisson.ecse.rpi.edu /~anand/voip/reports/survey/html/node13.html (77 words)

	PRESS RELEASE Encore Networks Strengthens Signaling Conversion Gateway With Out-Of-Band Offerings for Smaller VoIP Networks
		The SP-201-Z™, a member of Encore's flagship signaling gateway product line, delivers out-of-band to out-of-band signaling solutions that connect legacy to next generation networks.
		The key out-of-band signaling variants supported by the SP-201Z™ include: NI2 ISDN, ETSI ISDN, ANSI SS7, ITU C7, ETSI ISUP, as well as many other country-specific ISUP variants.
		This new version of the SP201-Z™ has been developed specifically to meet the requirements of smaller, low volume C7 and SS7 signaling conversion in VoIP service deployments.
	www.marketwire.com /mw/release_html_b1?release_id=77194 (588 words)

	Computer Telephony Glossary: A and B signaling T-1 transmission links in- band signaling T-1 transmission
		A type of in- band signaling used in T-1 transmission.
		Computer Telephony Glossary: A and B signaling T-1 transmission links in- band signaling T-1 transmission
		Procedure used in most T-1 transmission links where one bit, robbed from each of the 24 sub-channels in every sixth frame, is used for carrying dialing and controlling information.
	www.voicesaver.com /glossary/g_aandb.htm (54 words)

	GDC: Connects06
		Essentially, the SS7 network is a packet data network that provides out-of-band signaling for call control and advanced intelligent network services, such as 800 lookup, Caller ID, local number portability, etc. GDC provides a NEBS Level III compliant provisioning solution for the transport of signaling channels that eliminates the need for channel banks.
		Out-of-band signaling enables faster call setup times, more efficient use of voice circuits, as well as allowing for advanced features such as Caller ID.
		Therefore, the signaling traffic system and management paths remain in place even when the primary voice trunks are out of order.
	www.gdc.com /corporate_news/connects06/application_story/ss7interswitch.shtml (519 words)

	In-band Signaling
		The problem with in-band signaling it the possibility of talk down, which refers to the premature activation or deactivation of supervisory equipment by an inadvertent sequence of voice tones through normal usage of the channel, especially in single-frequency systems.
		Here signaling is directly carried out in the voice band, i.e., from 300 Hz to 3400 Hz.
		To avoid this, filter to bypass signaling tones may be used, but these offer some degradation to speech.
	poisson.ecse.rpi.edu /~anand/voip/reports/survey/html/node12.html (116 words)

	Articles - Clock network
		A clock network synchronized to the standard UTC time also allows different television facilities to coordinate their activities without complicated out-of-band signaling.
		Some master clocks were set up to control the frequency of a generating authority's mains output; others, in the UK, were arranged to synchronise themselves with the Greenwich Time Signal pips.
		Some slave clocks will run independently if they lose the master signal, often with a warning light lit.
	www.sinoz.com /articles/Clock_network (478 words)

	Hill Associates - Core Technology Course Description
		This course examines the concept of out-of-band signaling in general, and SS7 in particular.
		Signaling System 7 (SS7) is the lifeblood of all intelligent network services.
		An understanding of the intelligent network concept and who could benefit from the use or development of an intelligent network application is provided.
	www.hill.com /training/core/course.asp?course=CD_0024 (349 words)

	Definition: in-band signaling
		in-band signaling: Signaling that uses frequencies or time slots within the bandwidth or data stream occupied by the information channel.
	www.atis.org /tg2k/_in-band_signaling.html (57 words)

	AT&T News Release, 1994-03-08, ACCI and AT&T promote Convert ITR, an ISDN signaling converter
		The key to Convert ITR is its ability to translate standard out-of-band signaling carried over ISDN's "D" channel into inband, dual-tone multifrequencies used by non-ISDN switches.
		ACCI, which designs and develops PC-based call processing systems, will supply ATandT customers with its Convert ITR that translates out-of-band signaling into a format compatible with non-ISDN switches.
		Call information carried over the ISDN signaling channel is formatted and sent out to the corresponding customer premises equipment.
	www.att.com /news/0394/940308.bsb.html (522 words)

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In the News (Thu 10 Dec 09)