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Session Initiation Protocol (SIP) Public Switched Telephone Network (PSTN) Call Flows
White Papers This paper contains best current practice examples of Session Initiation Protocol (SIP) call flows showing interworking with the Public Switched Telephone Network (PSTN). PSTN calls are illustrated using global telephone numbers from the PSTN and...
[December 27, 2004, 2:00]
Edinburgh Council inks multimillion deal with BT
News The City of Edinburgh Council has signed a three-year, £3.2m deal with BT for a fixed-rate telephone network. The network will run on the BT Hosted Voice platform providing a virtual private telephone network to all of the council's sites, and will...
[August 28, 2008, 9:16]
VoIP in demand at M&S
News At present, the retailer has an IP-based WAN for data, and a separate network for telephone calls - both currently operated by Cable & Wireless (C&W). Marks and Spencer is planning to shift to a VoIP telephone service across its UK operations.
[May 19, 2005, 10:45]
Businesses hit by BT fire
News A massive fire that has hit BT's telephone network is affecting more than 130,000 homes and businesses in the Manchester area. This mile-long tunnel carries 44 cables, each containing 24 optical fibres, and connects two of Manchester's largest...
[March 29, 2004, 17:00]
Switching to VoIP review
Reviews It explains the convergence of voice and data, the basics of the older Public-Switched Telephone Network (PSTN) versus new IP telephony, and, of course, goes into the technical details of how VoIP works.
[September 2, 2005, 10:50]
12Connect SIP Softphone (VoIP calling)
Downloads With 12Connect you can call within the network with no additional telephone charges. Communicate with your colleagues and employees, friends and relatives, using a line with a quality comparable to standard Telephone Lines.
[December 15, 2009, 23:11]
Break-up calls leave BT unmoved
News BT has brushed off claims that it should be broken up to prevent it dominating Broadband Britain through its ownership of the UK's local telephone network. Back in February, Cable & Wireless told a parliamentary select committee that Britain would...
[November 4, 2002, 12:48]
PLDT, the Leading Telecommunications Provider in the Philippines, Selects Allied Telesis Advanced Gigabit Switches for the Layer 2 Aggregation Requirements of Its Next Generation Network
White Papers Philippine Long Distance Telephone Company (PLDT) started out as a POTS (plain old telephone service) provider. The company needed a dramatic network bandwidth increase and security/confidentiality of subscriber's network traffic.
[July 18, 2008, 1:01]
Be extends super-fast broadband network
News Be announced this week that it has now installed its equipment in 500 BT telephone exchanges. Last month it was criticised by the Advertising Standards Agency (ASA) for misleading customers, after not making it clear that customers could only get...
[February 15, 2007, 11:59]
Cisco Network Solutions for the Telco DCN: SONET/SDH OSI Environments
White Papers This paper is directed to Competitive Local Exchange Carriers (CLECs), incumbent Local ExChange Carriers (ILECs), and Post, Telephone and Telegraphs (PTTs), collectively referred to as telcos (short for telephone companies).
[June 12, 2008, 1:01]
A guide to VoIP telephony review
Reviews The old PSTN (Public Switched Telephone Network) telephony system of point-to-point connections provided by a monopoly service provider (British Telecom in the UK) supports a line rental plus a charge-per-call payment model, with rates set by the...
[July 26, 2006, 9:55]
Juniper's sub-£500 'hot spot in a box'
News For the upcoming bundle, Juniper has added these gateway functions to its E-series line of telephone network equipment, which is currently used by Korea Telecom, Australia's Telstra and NTT in Japan, among other carriers.
[May 21, 2003, 9:45]
Enum registry could revolutionise VoIP
News Currently most VoIP calls pass over the public telephone network, incurring a charge, which is often passed on to the person who makes the call. The so-called Enum (from tElephone NUmber Mapping) registry is to be created by Nominet, the company...
[November 27, 2007, 12:06]
Enum VoIP registry goes live in UK
News The idea behind Enum is to allow businesses to use standard telephone numbers with their VoIP systems and have calls carried solely over the internet, rather than first being routed over the traditional PSTN network.
[March 12, 2009, 15:24]
Phone giants dial up Wi-Fi mobile
News The expensive and difficult-to-find device uses both a cellphone network and -- through the use of voice over Internet Protocol and a Wi-Fi network -- a wired telephone network. Japan's NTT Communications, Britain's BT Group and four other major...
[July 15, 2004, 10:35]
Networks '98: Home networking via phone line cabling
News The group, made up of AMD, 3Com, AT&T, Compaq, Intel, IBM, Lucent, Rockwell and Tut Systems, are nearing completion on a system that will provide a 1Mb/s network between home computers using existing telephone cable and an add-in card "that looks...
[June 23, 1998, 17:40]
Tackling VoIP security concerns
News Of course, the traditional telephone network (public switched telephone network, or PSTN) is not invulnerable to security breaches. Some of the security issues that affect VoIP are the same ones that affect any IP network, and some are unique to...
[September 27, 2006, 15:10]
A Year Ago: BT launches London DSL trials
News Covering twenty telephone exchanges in the north and west of the city, the trials provide permanent VPN (virtual private network) or Internet access at either 384Kbps or 2Mbps over ordinary telephone wiring.
[October 14, 1999, 7:00]
BT denies network sell-off rumours
News A report in last weekend's edition of The Observer claimed that incoming chief executive Ben Verwaayen was considering splitting BT by selling off the fixed-line telephone network -- often referred to as the company's crown jewels.
[January 7, 2002, 12:23]
Clock ticking for ISP VoIP-tapping
News It's clear from the Federal Communications Commission's 59-page decision, released late Friday evening, that any VoIP provider linking with the public telephone network must be wiretap-ready. It represents what critics call an unreasonable...
[September 27, 2005, 10:35]
