Does it pay to buy IP Transit instead of investing in your own international IP network? TeliaSonera thinks it does.
For one thing, TeliaSonera officials say, large-scale peering drives excessive costs. “While capacity prices have been stable or decreasing in most important markets, router prices have increased – making capital expenditure the dominating risk factor. The more peers, the more related equipment required, and the higher the capital expenditure.”
And if that’s not enough, there are the increased network management costs. “Another burdensome task is managing these extended networks, as well as any additional related equipment. The implementation and management of new routers incurs new, not infrequently unexpected costs, including higher personnel costs.”
In general, Telia-Sonera officials say, peering agreements pay off “when the number of peers is few and the network coverage is low. Here is where IP Transit comes in as the most cost- efficient solution.
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In a recent discussion of E911 on military bases, E911 vendor RedSky provided a good summary of the four key components of such systems, on military bases or otherwise.
PBX/Communication Server. The PBX must be a reliable system that will always complete a 911 call. It must be able to out-pulse a unique seven or ten digit telephone number, the Automatic Number Identification, (ANI) that is used to identify the caller. Most new PBXs or call servers can provide this functionality and some can be configured for 99.999% call processing reliability. Older PBX and key systems may not be capable of out pulsing the ANI. Check with your PBX representative to make sure your systems comply.
911 Call Routing: ISDN PRI or CAMA trunks from the PBX the Central Office are required to carry the seven or ten digit ANI to the Public Safety Answering Point (PSAP). CAMA requires a seven-digit number while ISDN uses a ten-digit number. The central office identifies a 911 call by the trunk it came in on or by the string of digits. At the central office, the 911 call is sent to a tandem router, which sends the call to the PSAP geographically responsible for the call.
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Want to know how to keep your e-marketing safe from threats? You sure do. Fortunately Sophos is here to help, with some best practices:
Choose a dedicated server, not a shared one. To save money, many companies opt to use a shared server to host their site’s files. This means many different sites are running on the same machine, sharing the same programs and scripts to run applications that are common to all of the sites—things like email services or control panels, for example.
This means that it’s not just you or your company’s staff that has access to your server. Hundreds (if not thousands) of other people in other companies do as well. If your provider or a fellow customer is lax in its security and a site on your shared server gets compromised, your site and its data are at risk as well.
Don’t run what you don’t need. Many web hosting companies offer a number of services to their customers out of the box; however, every application hosted on your server represents another opportunity that a hacker can use to break into your site. A number of these common programs represent large vulnerabilities, including web mail. If your web host offers a service that you simply don’t need, make sure they are not installed on your server.
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The Cisco 7600 Series Session Border Controller is desgined to build on the continuous system operation and multimedia scalability provided by the Cisco 7600 Series Routers, according to Cisco officials.
With the integration of SBC functions into Layer 2 and Layer 3 services provided by the Cisco 7600 Series, they say, “the Cisco 7600 SBC eliminates the need for overlay networks and standalone appliances. It provides an open and flexible architecture for all service provider deployments, whether for peering with other service providers or for direct end-customer access."
SBCs control and manage real-time multimedia traffic flows between IP network borders, handling signaling, data, voice, and video traffic. As part of this function, the SBC performs native IP interconnection functions required for real-time communications such as access control, firewall traversal, bandwidth policing, accounting, signaling interworking, legal intercept, and quality-of-service (QoS) management.
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