Context article date October 2009 SS7stack M3UA stands for Message Transfer Part MTP Level 3 MTP3 User Adaptation Layer as defined by the IETF SIGTRAN working group in RFC 4666 which replaces and supersedes RFC 3332 . M3UA enables the SS7 protocol s User Parts e.g. ISDN User Part ISUP , Signalling Connection Control Part SCCP and Telephone User Part TUP to run over IP instead of telephony equipment like ISDN and PSTN . It is recommended to use the services of Stream Control Transmission Protocol SCTP to transmit M3UA. An open implementation of the M3UA standard can be found at OpenSS7 s http www.openss7.org m3ua.html web site . OpenSS7 uses Streams oriented development which makes it very hard to understand for SS7 beginners, and hard to program with for those unfamiliar with Streams. Wireshark is shipped with a dissector for M3UA, sample packets can be found in Wireshark s wiki page http wiki.wireshark.org SampleCaptures?action AttachFile&do view&target isup.cap ISUP Packet sample includes M3UA Protocol M3UA uses a complex state machine to manage and indicate states it s running. Several M3UA messages are mandatory to make a M3UA association or peering fully functional ASP UP, ASP UP Acknowledge, ASP Active, ASP Active Acknowledge , some others are recommended Notify, Destination Audits DAUD . External links http www.shabdcom.org index.php?option com content&view article&id 54&Itemid 55 Open Source M3UA Library Category Internet protocols Category Internet standards Category Signaling System 7 compu network stub ... more details
Infobox Planet minorplanet yes width 25em bgcolour FFFFC0 apsis name Burov symbol image caption discovery yes discovery ref discoverer L. V. Zhuravleva discovery site Crimean Astrophysical Observatory discovered September 26, 1978 designations yes mp name 8612 alt names 1978 SS7 mp category orbit ref epoch May 14, 2008 aphelion 2.8375515 perihelion 1.8751515 semimajor eccentricity 0.2042140 period 1321.1695213 avg speed inclination 4.74203 asc node 351.54141 mean anomaly 22.10349 arg peri 86.13673 satellites physical characteristics yes dimensions mass density surface grav escape velocity sidereal day axial tilt pole ecliptic lat pole ecliptic lon albedo temperatures temp name1 mean temp 1 max temp 1 temp name2 max temp 2 spectral type abs magnitude 14.8 8612 Burov 1978 SS7 is a Asteroid belt main belt asteroid discovered on September 26, 1978 by L. V. Zhuravleva at the Crimean Astrophysical Observatory . External links http ssd.jpl.nasa.gov sbdb.cgi?sstr 8612 Burov JPL Small Body Database Browser on 8612 Burov MinorPlanets Navigator 8611 1977 UM4 8613 1978 VE10 MinorPlanets Footer DEFAULTSORT Burov Category Main Belt asteroids Category Discoveries by Lyudmila Zhuravlyova Category Astronomical objects discovered in 1978 beltasteroid stub fa it 8612 Burov la 8612 Burov hu 8612 Burov pl 8612 Burov pt 8612 Burov uk 8612 vi 8612 Burov yo 8612 Burov ... more details
SS7 . ISDN signaling is used primarily on trunks connecting end user private branch exchange PBX systems to a central office . SS7 is primarily used within the PSTN. The two signaling methods are very ... in both ISDN and SS7. Notes Reflist References div class references small cite book last Ronayne ... more details
is within the SS7 Postcode Area, most of it in SS7 3, with small parts in SS7 2 mostly Hadleigh and SS7 1 mostly South Benfleet . Transport Thundersley is bounded by the A127 road to the north ... more details
A Media Gateway Controller MGC is a system used in certain voip Voice over IP telephony architectures. An MGC controls a number of dumb terminal s, the Media Gateway s. The MGC receives signalling information like dialed digits from the Media Gateway and can instruct it to alert the called party, to send and receive voice data etc. There are several protocols which can be used between MGC and Media Gateway Simple Gateway Control Protocol SGCP , Internet Protocol Device Control IPDC , MGCP and Megaco also known as H.248 . The MGC receives also the term Call Agent when referred in the context of MGCP. Some MGCs can interface with other signalling protocols, like SS7 for interconnection with the traditional telephone system , H.323 and Session Initiation Protocol SIP . A VoIP architecture using an MGC is sometimes called a softswitch architecture. Advantages of a softswitch architecture are that the Media Gateways are easy to maintain and that the softswitch operator retains full control. On the downside, softswitch architectures tend to be inflexible. Highly available MGCs are expensive to implement, as an MGC needs to be stateful. See also http www.packetizer.com voip h248 H.248 Information Site This site provides information related to H.248, including pointers to standards and draft specifications Category Internet protocols compu network stub de Media Gateway Controller uk Media Gateway Controller ... more details
Unreferenced date December 2009 A network monitoring interface card or NMIC is similar to a network card NIC . However, unlike a standard network card, an NMIC is designed to passively and silently listen on a network. At a functional level, an NMIC may differ from a NIC, in that the NMIC may not have a MAC Address , may lack the ability to transmit and may not announce its presence on a network. Advanced Network Monitoring Interface Cards have features that include an ability to offload CPU intensive processing from a system s CPU, accurate time measurement, traffic filtering, and an ability to perform other application specific processing. Organizations often use a dedicated interface for all management traffic and thus create a management network . This is done to minimize the impact on production traffic, ensure the integrity of management traffic and it helps by measuring true production traffic not the traffic generated to the act of measuring traffic. This is a separate function from NMICs that are used for data collection and processing. NMICs are typically used in intrusion detection and prevention IDS IPS , lawful interception , flow analysis, network monitoring , and protocol analyzer systems. Notable Manufacturers Napatech Endace See also TCP segmentation offloading TCP Offload Engine TOE Unified Threat Management UTM Intrusion detection system IDS Lawful interception Flow analysis Network monitoring Network tap Protocol analyzer Ingress filtering Egress filtering SS7 probe Category Networking hardware no Network Monitoring Interface Card ... more details
merge school Castle Point date January 2012 refimprove date January 2012 Infobox UK school name Woodham Ley Primary School image Woodham Ley Primary School.gif size latitude longitude dms motto motto pl established 1928 approx closed c approx type religion Non denominational president head label Head Teacher head Mr. D. Walton r head label r head chair label chair founder founder pl specialist street Rushbottom Lane city Great Tarpots county Benfleet country United Kingdom postcode SS7 4DN LEA ofsted staff enrollment 149 gender Mixed lower age 4 upper age 11 houses colours publication free label 1 free 1 free label 2 free 2 free label 3 free 3 website http www.woodhamley.ik.org website name Woodham Ley Primary School Website Woodham Ley Primary school is a primary school located in the town of New Thundersley, Benfleet in the Castle Point district of Essex in the South East of England . The school has an enrollment of 149 Children. ref http www.goodschoolsguide.co.uk school woodham ley primary school.html ref See also List of primary schools in Essex References Reflist Schools in Essex Coord 51.5717 0.5485 type edu region GB ESS display title Category Primary schools in Essex Essex school stub ... more details
pp semi protected small yes Infobox UK school name The Appleton School image Appleton School, Benfleet geograph.org.uk 937354.jpg size 250px latitude 51.56343 longitude 0.55295 dms dms motto motto pl established approx closed c approx type Academy English school Academy religion president head label Headteacher head r head label r head chair label chair founder founder pl specialist Business and Enterprise College specialist pl street Croft Road city Benfleet county Essex country England postcode SS7 5RN LEA Essex ofsted yes urn 115334 staff enrollment 1200 gender Coeducational lower age 11 upper age 16 houses colours publication free label 1 free 1 free label 2 free 2 free label 3 free 3 website website name http www.theappletonschool.org The Appleton School is a secondary school located in Croft Road Benfleet , Essex , England . It currently accommodates 1,180 students from school years 7 to 11, and roughly 50 teachers. External links http www.theappletonschool.org School Website http www.essexbsf.org Essex BSF Schools Schools in Essex Category Academies in Essex Category Business and Enterprise Colleges in England Essex school stub ... more details
Infobox UK school name The Deanes School image size latitude 51.56798 longitude 0.5995 dms motto motto pl established approx type Foundation School religion president head label head r head label r head deputy head label deputy head r deputy head label r deputy head chair label chair founder founder pl specialist Sports specialist pl street Daws Heath Road Thundersley city Benfleet county Essex country flagcountry England postcode SS7 2TD LEA Essex ofsted dcsfno dcsfurn 115340 staff enrollment gender Mixed sex education Coeducational lower age 11 upper age 16 houses colours publication website http www.deanesschool.co.uk website name The Deanes School is a school located in Benfleet, Essex. ref http www.deanesschool.co.uk Contact.html ref The school takes its name from an area of forest called The Deanes Wood &ndash so called because it was owned by the Dean of St Paul s Cathedral. The Deanes School is a Specialist Sports College and has over 1100 students. ref http www.deanesschool.co.uk History.html ref See also List of secondary schools in Essex References Reflist External links http www.essexbsf.org Essex BSF Schools Schools in Essex Category Comprehensive schools in Essex ... more details
Infobox locomotive name China Railways 6K powertype Electric image 6K 052 Srbd.jpg caption 6K 052 builder Kawasaki Heavy Industries builddate 1986 1987 totalproduction 85 aarwheels uicclass Bo Bo Bo gauge RailGauge sg allk on al on trucks bogies wheeldiameter trailingdiameter minimumcurve wheelbase length convert 22.2 m ft abbr on width height framesize axleload weightondrivers 23 t locoweight convert 138.0 t lk on sandcap electricsystem 25 kV AC collectionmethod Pantograph rail Pantograph tractionmotors Mitsubishi Electric MB 530 AVR topspeed convert 100 km h mph abbr on poweroutput tractiveeffort factorofadhesion trainheating locobrakes locobrakeforce trainbrakes safety railroad China Railway roadnumber 6K 001 6K 086 The 6K is a Japanese built electric locomotive used in China. It is developed and built by Kawasaki Heavy Industries and Mitsubishi Electric . The design of 6K is based on JNR Class JNR Class ED75 ED75 and JNR Class EF66 EF66 electric locomotives . It is the first locomotive with Bo Bo Bo wheel arrangement used in China. In total 85 6Ks were built between 1986 and 1987 . Each 6K locomotive uses CLG 616 phase splitter and 6 Mitsubishi Electric MB 530 AVR DC traction motors. 6K was one of the most reliable electric locomotives in China compared with SS1, SS2 and SS3 at the time of entering service. China later made SS7 locomotive with reference to the Tri Bo wheel arrangement of 6K, the breakdown rate, however, was still high, until its modified version SS7B, SS7C and SS7D designed. See also China Railways SS7 External links http www.khi.co.jp sharyo pro final pro 6k e.html Product information Kawasaki http www.railwaysofchina.com 6k.htm 6K Railways of China Locomotives of China Electric loco stub Category 25 kV AC locomotives Category Bo Bo Bo locomotives Category Electric locomotives of the People s Republic of China 6K Category Kawasaki locomotives Category Railway locomotives introduced in 1986 hu China Railways 6K ja 6K zh 6K ... more details
systems which are message oriented such as SS7 and ISDN Q.931 where each message is able ... DTMF is an in band, channel associated register signaling system. It is not compelled. SS7 e.g. TUP ... more details
2010 03 21. ref The HP OpenCall Universal Signaling Platform USP connects SS7 and IP SIGTRAN networks ... Research Library. HP Open Call SS7. ref HP Communications & Media Solutions markets three subscriber ... more details
A Media gateway is a translation device or service that converts digital media streams between disparate telecommunications networks such as PSTN , Signaling System 7 SS7 , Next Generation Networks 2G , 2.5G and 3G radio access networks or Private branch exchange PBX . Media gateways enable multimedia communications across Next Generation Networks over multiple transport protocols such as Asynchronous Transfer Mode ATM and Internet Protocol IP . Because the media gateway connects different types of networks, one of its main functions is to convert between different transmission and coding techniques see also Transcode . Media streaming functions such as echo cancellation , DTMF , and tone sender are also located in the media gateway. Media gateways are often controlled by a separate Media Gateway Controller which provides the call control and signaling functionality. Communication between media gateways and Call Agent s is achieved by means of protocols such as MGCP or Megaco H.248 or Session Initiation Protocol SIP . Modern media gateways used with SIP are often stand alone units with their own call and signaling control integrated and can function as independent, intelligent SIP end points. Voice over Internet Protocol VoIP media gateways perform the conversion between Time division multiplexing TDM voice to a media streaming protocol usually Real time Transport Protocol , RTP , as well as a signaling protocol used in the VoIP system. Mobile access Media Gateways connect the radio access networks of a public land mobile network PLMN to a Next Generation Core network . 3GPP standards define the functionality of CS MGW and IMS MGW for UTRAN and GERAN based PLMN s. See also Signaling gateway References Unreferenced date March 2009 references External links http www.infonetics.com resources purple.shtml?ms06.ngv.1q06.nr.shtml Carrier VoIP IMS market down 7 in 1Q06, up 48 since 1Q05 http www.townsendassets.com company voip marketshare.htm Cable Companies Scramble for t ... more details
In telephony , multi frequency signaling MF is an outdated, in band Signalling telecommunication signaling technique. Numbers were represented in a two out of five code for transmission from a multi frequency sender, to be received by a multi frequency receiver in a distant telephone exchange . MF was used for signaling in trunking applications, and is a precursor of modern DTMF signaling TouchTone now used for subscriber signaling. Using MF signaling, the originating telephone switching office sends a starting signal such as a seizure off hook by toggling the AB bits. After the initial seizure, the terminating office acknowledges a ready state by responding with a wink short duration seizure and then goes back on hook wink start . The originating office sends the destination digits to the terminating switch. MF and other in band signaling systems differ from Signaling System 7 SS7 in that the routing digits are out pulsed in MF format in the same voiceband channel used for voice. The user dialing cannot detect these digits being out pulsed because the audio connection is not established all the way to the user s handset or device until after the connection is established with the terminating switch. Following a full connection, the same audio channel is connected to the user in order to communicate the voice, modem or fax data across that same 64 kbit channel previously used for the in band MF signaling. Out of band Common Channel Signaling is nearly universal today in the United States . Benefits include higher connection establishment rate, more fraud security antiphreaking measures , and features such as Caller ID however, some 911 Public Safety Answering Point s PSAPs still use the MF format to process calls from Mobile Telephone Switching Office s MTSOs and land telephone offices. Other countries may still use a version of in band signaling. MF signaling includes R2 signalling R2 signaling , R1 ref name q310 http www.itu.int rec T REC Q.310 Q.332 en ITU T Reco ... more details
about the network protocol the company with NASDAQ ticker symbol INAP Internap oneref date December 2009 SS7stack The Intelligent Network Application Part INAP is a signalling protocol used in the Intelligent Network intelligent network architecture. It is part of the Signaling System 7 SS7 protocol suite, typically layered on top of TCAP.It can also be termed as logic for controlling telecommunication services migrated from traditional switching points to computer based service independent platform http www.iec.org online tutorials intern in index.html The International Telecommunication Union ITU defines several capability levels for this protocol, starting with Capability Set 1 CS 1 . A typical application for the Intelligent Network IN is a Number Translation service. For example, in the United Kingdom , 0800 numbers are freephone numbers and are translated to a geographic number using an IN platform. The Telephone exchanges decode the 0800 numbers to an IN trigger and the exchange connects to the IN. The Telephone exchange uses Transaction Capabilities Application Part TCAP , Signaling Connection and Control Part SCCP and INAP and in IN terms is a Service switching point Service Switching Point . It sends an INAP Initial Detection Point IDP message to the Service Control Point SCP . The SCP returns an INAP Connect message, which contains a geographic number to forward the call to. INAP messages are defined using Abstract syntax notation one ASN.1 encoding. Signaling Connection and Control Part SCCP is used for the routing. Extended form of INAP is Customised Applications for Mobile networks Enhanced Logic C ustomised A pplications for M obile E nhanced L ogic CAMEL . TCAP is used to separate the transactions into discrete units. Category Signaling System 7 Category Application layer protocols ro INAP ru INAP sk Intelligent Network Application Part sr INAP ... more details
Unreferenced auto yes date December 2009 Technical date April 2010 In telecommunications , a network to network Interface NNI is an interface which specifies signaling and management functions between two networks. NNI circuit can be used for interconnection of either signalling e.g. SS7 , Internet Protocol IP e.g. Multiprotocol Label Switching MPLS or Asynchronous Transfer Mode ATM networks. Basically NNI is used for interconnection of P Router s class 4 or higher provider core in signaling or GMPLS networks. NNI can be used for interconnection of two VoIP nodes. In GMPLS case that could be Back to Back or EBGP or mixed NNI connection scenarios depends on what type of Virtual Routing and Forwarding VRF exchange is used for interconnection. In case of Back to Back VRF it is necessary to create VLANs and subsequently sub interfaces VLAN headers and DLCI headers for Ethernet and Frame Relay network packets on the each interface used for the NNI circuit. In case of eBGP NNI interconnection P routers are taught how to dynamically exchange VRF records without VLAN creation. In cases of mixed or full mesh scenarios, other NNI types are possible. Note that there could be different encapsulation types for NNI interconnection, but Ethernet GigE and frame relay are basically used. Network network Interface in telecommunications . See also User network interface Asynchronous Transfer Mode DEFAULTSORT Nni Category Network management Compu network stub de Network to Network Interface ja ... more details
Refimprove date February 2008 Technical date May 2008 An SMS gateway is a telecommunications network facility for sending or receiving Short Message Service SMS transmissions to or from a telecommunications network that supports SMS. Most messages are eventually routed into the mobile phone networks. Many SMS gateways support media conversion from email and other formats. Gateway types Unreferenced section date May 2009 Some SMS gateway providers can be classified as aggregators or Signaling System 7 SS7 providers. The aggregator model is based on multiple agreements with mobile carriers to exchange two way SMS traffic into and out of the operator s short message service center SMSC , also known as local termination model . Aggregators lack direct access into the SS7 protocol, which is the protocol where the SMS messages are exchanged. These providers have no visibility and control over the message delivery, being unable to offer delivery guarantees. SMS messages are delivered in the operator s SMSC, but not the subscriber s handset. Another type of SMS gateway provider is based on SS7 connectivity to route SMS messages, also known as international termination model . The advantage of this model is the ability to route data directly through SS7, which gives the provider total control and visibility of the complete path during the SMS routing. This means SMS messages can be sent directly to and from recipients without having to go through the SMSC of other mobile operators. Therefore, it is possible to avoid delays and message losses, offering full delivery guarantees of messages and optimized routing. Citation needed date May 2009 Several operators have true fixed wire SMS services. These are based on extensions to the European Telecommunications Standards Institute ETSI Global System for Mobile Communications GSM SMS standards and allow fixed fixed, fixed mobile and mobile fixed messaging. These use frequency shift keying to transfer the message between the termina ... more details
Infobox company company name COMindico company logo Image COMindico.png center company type Private Company Private Company Defunct company slogan We listen, so you can deliver foundation 2000 purchased in 2004 by Soul telecommunications SPT . industry Telecommunication s location Sydney, Australia Sydney , Australia headquarters products Telephone , Internet service provider Internet Access homepage http www.comindico.com.au dynamic main index.jsp www.comindico.com.au COMindico was an Australian IP telecommunications carrier. It started as IPTel in 2000 by Wayne Passlow with the backing of AGL Energy AGL , AMP Limited AMP , JPMorganChase , James Packer CPH and Lachlan Murdoch Queensland Press . COMindico built a 100 Cisco Systems Cisco powered IP MPLS network with Signaling System 7 SS7 interconnects to Telstra from its 66 POPs situated in each of Telstra s call collection zones, allowing VoIP and internet access to over 97 of Australians. ref cite web url http www.comindico.com.au dynamic main media release documents The future of telecommunications.pdf title The Future Of Telecommunications date 2004 01 01 accessdate 2008 09 06 archiveurl http web.archive.org web 20050615113744 http www.comindico.com.au dynamic main media release documents The future of telecommunications.pdf archivedate 2005 06 15 ref It was the largest rollout of Cisco s Media Gateway Control Protocol MGCP technology in the world at the time. Citation needed date October 2007 In mid 2004, SP Telemedia now Soul telecommunications Soul Australia acquired COMindico. In April 2008 TPG acquired Soul Australia in a reverse takeover. References reflist Category Defunct telecommunications companies of Australia ... more details
Infobox company name Edutel B.V. logo type Besloten Vennootschap genre fate predecessor successor foundation 1998 founder defunct location city Eindhoven location country Netherlands location locations area served Netherlands key people industry Telecommunication s products Broadband Internet access Broadband Internet br Telephony br IPTV production services revenue operating income net income aum assets equity owner num employees parent divisions subsid homepage http www.edutel.nl edutel.nl footnotes intl Edutel B.V. is a Netherlands Dutch telephone companies telephone company , Internet Service Provider and IPTV supplier together with Glashart Media . Edutel is one of the first companies focussed on FTTH and FTTB services and is a key player in this upcoming market since 2004. Its main activity is providing FTTH and FTTB multiplay services for private and business use such as telephony, internet and radio television services. They have a direct connection to the Amsterdam Internet Exchange AMS IX and the Signaling System 7 SS7 network. Since 2005 they also handle all telephone and Internet traffic for one of the first Dutch Fiber to the premises FTTH networks Ons Net Nuenen. They currently provide these services for multiple Fiber to the premises FTTH projects, such as OnsBrabantNet, Ons Net Eindhoven, and as previously mentioned Ons Net Nuenen. Edutel provides also FTTH services outside the province of Brabant in FTTH networks from Reggefiber. External links http www.edutel.nl Edutel official website http www.onsnetnuenen.nl Ons Net Nuenen official website http www.onsbrabantnet.nl OnsBrabantNet official website http www.onsneteindhoven.nl Ons Net Eindhoven official website Category Telecommunications companies of the Netherlands telecom company stub ... more details
Unreferenced date January 2007 Main article Signalling telecommunications The term compelled signalling refers to a class of telecommunications signalling protocols where receipt of each discrete signal needs to be explicitly acknowledged before the next signal is able to be sent. For example, in R2 signalling R2 register signalling , the transmission of each signal involves the following five events The outgoing trunk begins sending the tones that correspond to the signal it wishes to convey in the forward direction The incoming trunk, once it is sure to have correctly detected the above signal, begins sending a set of confirmation tones in the backward direction The outgoing trunk, once it is sure to have correctly detected the confirmation tones, stops sending the signal tones in the forward direction The incoming trunk, once it is sure to have detected the end of the signal tones that is that the forward channel is now silent stops sending its confirmation tones in the backward direction Before being able to begin sending the next signal, if any, the outgoing trunk needs to ensure that it is receiving silence on the backward channel. The term is only relevant in the case of signalling systems that use discrete signals e.g. a combination of tones to denote one digit , as opposed to signalling systems which are message oriented, such as Signaling System 7 SS7 and ISDN Q.931, where each message is able to convey multiple items of information e.g. multiple digits of the called telephone number . The contrary of compelled signalling is referred to as non compelled signalling. An example includes DTMF , where the originating side sends tones and silence in the forward direction, without being able to ascertain whether each tone has been correctly received by the terminating side. In order to minimise the risk of signalling errors, minimum durations are imposed, both on the tones and on the intervening periods of silence. DEFAULTSORT Compelled Signalling Category Telep ... more details
File Nortel CS1000E.JPG 150px right thumb Avaya CS1000E The Nortel Communication Servers is a series of products that Nortel manufactures now acquired by Avaya for telephony communications. The equipment can support TDM and VoIP services for 150 users to 200,000 users or more. This product is part of Nortel s Unified communications Unified Communications system now acquired by Avaya . Scaling Communication Servers Communication Server 1000S Nortel Communication Server 1000 CS1000S 150 1,000 users Communication Server 1000M Nortel Communication Server 1000 CS1000M 1,000 10,000 users Communication Server 1000E Nortel Communication Server 1000 CS1000E 100 22,500 users Communication Server 1500 48,000 lines 8,400 trunks TDM and VoIP Nortel Communication Server 2100 Communication Server 2100 230,000 ports, ref cite web url http products.nortel.com go product assoc.jsp?segId 0&parId 0&catId null&rend id 31213&contOid 100176570&prod id 37501&locale en US title Communication Server 2100 Technical Specifications accessdate April 3, 2009 ref 125,000 IP phones, 150,000 analog telephones, 125,000 digital telephones, 200,000 IP trunks, 50,025 digital trunks, 32,000 analog trunks, 200,000 SS7 trunks, 4,093 H.323 gateways, 112,000 nodes per host, 99,999 ACD agents See also Avaya Innovative Communications Alliance Voice over IP VoWLAN List of telephone switches Nortel List of telephone switches References reflist External links commons cat Avaya commons cat Nortel http products.nortel.com go product content.jsp?segId 0&parId 0&prod id 55740&locale en US Communication & Application Servers Broken Avaya Category Avaya Comm Category Nortel products Category VoIP software Category VoIP hardware telecomm stub Compu network stub ... more details
ISDN , Channel Associated Signaling CAS and Signaling System 7 SS7 needed to reach a broader, worldwide ... with CAS, ISDN and SS7 signalling and protocol support. Prosody X variants can also be used with Aculab s protocol stacks to connect to SS7 networks for ISDN User Part ISUP and non call related ... SIP or H.323, and legacy equipment deployed in networks running CAS, ISDN or SS7 protocols. ApplianX ... more details
A Signal Transfer Point STP is a router that relays Signaling System 7 SS7 messages between signaling end points Signaling End Point SEPs and other signaling transfer points STPs . Typical SEPs include service switching points Service switching point SSPs and service control points Service Control Point SCPs . The STP is connected to adjacent SEPs and STPs via Signaling System 7 signaling links . Based on the address fields of the SS7 messages, the STP routes the messages to the appropriate outgoing signaling link. Edge STP Edge STPs can also route based upon message body content using deep packet inspection techniques, and can provide address translations and screen content to limit the transfer of messages with dubious content or sent from unreliable sources. To meet stringent reliability requirements, STPs are typically provisioned in mated pairs. These routers are connected just by signaling links they don t have users attached where a user could be a mobile station MS , a PSTN user in case of a public terrestrial network, or a piece of terminal equipment at the end of an ISDN B channel . SEPs send signaling messages to other SEPs, but the messages are normally routed via the SEP s adjacent STPs. An STP s main function is to identify the best path for two SEPs to communicate. A typical application would be for two SEPs to agree on the use of a shared data path e.g., using ISUP to initiate a voice call between a user on one SEP and a user on the second SEP . In this way, STPs route signaling messages for starting, maintaining or finishing any kind of calls originated by the SEPs attached users while avoiding disabled intermediary STPs. A signaling message typically never goes directly from a given SEP to the destination SEP the message would normally have to pass through the initiating SEP s adjacent STP so that it can be routed to the destination SEP. In some applications, however, SEPs might be directly connected with signaling links this would typically be done ... more details
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