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More info on : DS3 providers

DS3 is commonly used by large companies which need: point-to-point (private line) circuits, MPLS (multiprotocol label switching) VPNs (Virtual Private Networks), voice (telephone), internet traffic, VoIP call centers, video conferencing and broadcast quality video transmission. Alternatives to, or variations of DS3 include: DS1, bonded DS1, fractional DS3, burstable DS3, voice DS3, data internet DS3, integrated DS3 and OC3. Each of these variations has advantages over the others, depending on the specific needs of your company. Also, the availability of each is based on the offerings and geographic proximity of each DS3 provider. Every DS3 provider has different specialties related to geographic specialization and the services they offer. A provider is considered tier 1 if they are also the carrier, the owner of the facilities they offer. DS3 providers are considered tier 2 if they are the direct reseller of the services of one or more carriers. A provider who resells the services offered by tier 2 DS3 providers is considered tier 3. Often, the services of tier 2 providers are less expensive than those offered by a tier 1 provider. However, whenever a customer can purchase directly from the tier 1 provider for a price that is similar or better than offered by a tier 2, it’s generally better to go with the tier one. This is because as the carrier (owner of the facilities), the tier 1 provider has direct access to all of their facilities. Although, almost all tier two providers offer service level agreements (SLAs) to guarantee service levels, there is only so much they can do, if they do not have direct access to the facilities they are reselling. This becomes especially important during installation, maintenance, and emergency outage situations. In these situations the tier two must coordinate with the tier one to resolve issues. As a general rule, the more entities that are involved, the greater are the coordination issues which can arise. Excessive coordination issues can result in down time for the end user. In many cases, down time equates to lost services and/or lost revenues. Tier 1 providers can commonly provide most forms of bandwidth, including most of the DS3 related services listed above. Usually, tier 2 providers are more specialized in their offerings (less variety), depending on their underlying contracts with the tier one providers. As the authorized sales agents for the top 20 tier 1 and tier 2 providers in the country, we can provide real-time comparative availability and price quotes for your business. For pricing, use the quoting tool at the top of this page. It is simple to use, free, unbiased and there is no obligation. (Click here to return to top of page)

For details on any T1 related service, click on the service listed below.

Bonded DS1 | Bonded T1 | Bonded T3 | Buy T1 | Burstable T1 | Burstable T3 | Business T1 | Channelized DS1
Channelized DS3 | Channelized T1 | Data T3 | Dedicated Line | Dedicated T1 | Dedicated VPN | DS1 Data
DS1 Line | DS1 Prices | DS1 Providers | DS1 Voice | DS3 Network | DS3 Prices | DS3 Providers | DS3 Quotes
Dynamic T1 | Fractional DS1 | Fractional T1 | Fractional DS3 | Frame Relay Quotes | Frame Relay T1
Integrated DS1 | Integrated T1 | Integrated T1 PRI | Local Voice T1 | MPLS Network | MPLS T1 | MPLS VPN
Multiprotocol Label Switching | OC3 Quotes | OC3 Prices | Point-to-Point Quotes | Point-to-Point T1 | PRI T1
Price T1 | Price T3 | Purchase T1 | T1-T3 | T1 Business | T1-DS1 | T1 Consultation | T1 Data | T1 Dedicated
T1 Frame Relay | T1 Information | T1 Integrated | T1 Los Angeles | T1 MPLS | T1 New York | T1 PRI
T1 Providers | T1 Voice | T1 VOIP | Telecommunication US | T3 DS3 | T3 Cost | T3 PRI | T3 Quotes | T3 Rates
Virtual Private Networks | Videoconferencing T1 | Voice T3 | SIP T1 | Class of Service | Bonded T1 MPLS
Ethernet over Copper | Colocation Services | Fixed Wireless | Ethernet MPLS | Virtual DIDs |

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 Is PRI the Right Choice for Your Company?

Written by: Dennis Green - Jul 4, 2009


PRI (Primary Rate Interface) is an ISDN connection designed to be provided over T1 lines. In the United States, a PRI line consists of 24 (64 kbps each) DS0 channels. PRI T1 lines are commonly configured so that 23 channels serve as B (Bearer) channels and one as a D (delta) channel. Each B channel serves as a voice (telephone) channel. The D channel provides control and signaling information for the B channels. B channels can be used as independent channels to simultaneously provide a variety of services such as internet, voice, or imaging. They also have the flexibility to be bonded, as needed, to provide higher bandwidth for special needs such as video conferencing. A significant difference between PRI T1 and traditional integrated T1 is that T1s which are not PRI require a portion of each channel to be allocated for signaling functions. This results in a reduction in effectiveness, efficiency, potential and bandwidth for most functions of each channel of non-PRI T1. With T1 PRI, all signaling functions are provided by the 24th channel. This leaves each of the other 23 channels with a full 64 kbps, which can be fully dedicated to bearer functions. One D channel can provide signaling functions for several other PRI lines. It is not uncommon for two D channels (one as primary, one for backup) to provide the signaling functions for a span of as many as 20 PRI T1 lines. This frees the 24th channel of each of the other PRI lines so that they can be used as additional bearer channels. Because PRI lines serve as a direct connection to the telephone company’s central office, PRI is often the preferred choice of PBX customers. PRI T1 provides many advantages over traditional voice T1. These include: call by call service selection, more PBX users can be supported, caller ID, DID (direct inward dial) numbers, messaging, and video conferencing. Because of increased efficiency provided by PRI, companies which switch to PRI from traditional voice T1 often find that they not only receive a much greater variety of services but often do not need to pay for as many trunks as they needed prior to the change. PRI T1 is available in most major metropolitan areas, but is not available in most isolated rural areas. To assess availability and pricing for your location, use the tool at the top of this page or on our home page. This tool will provide real-time answers, it’s free, easy to use, and there is no obligation. (Click here to return to top of page)