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[1]: §8 A single user agent may act as both UAC and UAS for different transactions: [1]: p26 for example, a SIP phone is a user agent that will be a UAC when making a call, and a UAS when receiving one. Additionally, some devices will act as both UAC and UAS for a single transaction; these are called Back-to-Back User Agents (B2BUAs).
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The VoIP E911 emergency-calling system associates a physical address with the calling party's telephone number. All VoIP providers that provide access to the public switched telephone network are required to implement E911, a service for which the subscriber may be charged. "VoIP providers may not allow customers to opt-out of 911 service."
VoIP vulnerabilities are weaknesses in the VoIP protocol or its implementations that expose users to privacy violations and other problems. VoIP is a group of technologies that enable voice calls online. VoIP contains similar vulnerabilities to those of other internet use. Risks are not usually mentioned to potential customers. [1]
Sim-card is put into GSM-gateways (or SIM-bank connected to GSM-gateway) in order to register it with the GSM network, at the same time the gateway is associated with VoIP through program switch. Accordingly, the traffic can be converted in and out between GSM and VoIP channels. SIP and H.323 protocols are used for media traffic termination.
Examples of CPE types include modems, routers, gateways, set-top boxes, and VoIP-phones. TR-069 was first published in May 2004, with amendments in 2006, 2007, 2010, July 2011 (version 1.3), [ 1 ] and November 2013 (version 1.4 am5) [ 2 ] The Home Gateway Initiative (HGI), Digital Video Broadcasting Project (DVB) and WiMAX Forum have endorsed CWMP.
Troubleshooting is a form of problem solving, often applied to repair failed products or processes on a machine or a system. It is a logical, systematic search for the source of a problem in order to solve it, and make the product or process operational again. Troubleshooting is needed to identify the symptoms.
According to NFPA 72 2010, 3.3.141, [1] an MFVN is defined simply as: A physical facilities-based network capable of transmitting real time signals with formats unchanged that is managed, operated, and maintained by the service provider to ensure service quality and reliability from the subscriber location to public switched telephone network (PSTN) interconnection points or other MFVN peer ...