Is DSL available everywhere?
DSL is available in limited areas and users must be within a certain distance from their local phone providers Central Office for DSL. Intralinx recommends that anyone over 12,000 feet from their Central Office not run VoIP across a DSL connection due to problems that start to arise with latency.
Are there any distance limitations?
Yes. You must be within 10,000 feet of your phone exchange Central Office (CO) for Intralinx VoIP service to run across a DSL connection.. Your exchange (the first three digits of your phone number) is the important variable.
Why is distance important with DSL?
If you have heard even something about DSL, you will have heard about distance. Your phone lines normally terminate at a telco office, usually nearby. This distance, (the length of your line between your location and the telco office), is a very important factor in whether or not you can get DSL, and what speed you can get.
Here are some rules of thumb for distance ranges. Please be aware that especially with non Telco ADSL lines, distance limits for speeds can vary widely from company to company. There are cases where it is policy for "residential" DSL lines not to be offered as far out as functionally identical "business" products!
Less than 5000 feet from Central Office
You will have little trouble getting all speeds of DSL
5000-10600 Feet from Central Office
You may have trouble getting the highest speeds on offer
10600-15000 Feet from Central Office
The danger zone for DSL from national providers. Speeds on offer are pinned back steadily until they reach 192k for 15,000 feet. If your line is longer than around 15000 feet, they may not accept an order and Intralinx would advise against VoIP
15000-18000 Feet From Central Office
In this range, Telco ADSL is normally still available, although it may be restricted to 300-500k speeds
18000-2200 Feet From Central Office
Telco ADSL is not available, although in a few areas, RADSL may be a product you can get. RADSL is speed-variable. Some smaller DSL specialist CLECs may have solutions for you
22000-28000 Feet From The Central Office
Using less commonly used DSL equipment, it is still possible to use lines of this length
18000-28000 Feet From Central Office
IDSL is an alternative or possibly the only alternative. IDSL is 144k/sec, about four-six times modem speed
28000-38000 Feet From Central Office
IDSL is the only alternative
What are the advantages of a voice T-1?
Cost savings because normally a provider can offer 24 channels on a T-1 for the about the same price as 12 standard telephone lines.
What are the advantages of a data T-1?
The dedicated always on connection speed and the reliability of T-1 service.
How does a T-1 know which lines are data and which lines are voice?
With a piece of equipment called a multiplexer (which is similar to a channel bank), the T-1 can be distributed into data circuits and voice channels.
What type of equipment is needed?
Intralinx supports multiple customer premises equipment (CPE) required to connect your network to the T1 line. You can either purchase the standard equipment provided by Intralinx or arrange for your own equipment.
A router is the only equipment that is required for installation. The T1 Router is delivered and configured to your opted speed and is available as part of your services.
If I'm considering a Fractional T1, how do I know what speed to choose?
The bigger the network your company has the higher the speed you will need. Contact Intralinx and we will work directly with you in accessing your needs both today and in the future.
How long does it take to install a T-1?
Thirty days in the industry standard, but for an additional charge we can work with your needs if you require services faster. Intralinx provides you with a dedicated account manager to handle everything from ordering to installation.
Am I restricted as to how far away from the Central Office I can be?
There are not distance restrictions with T-1's like DSL, but the further away your business is away form the Central Office the higher the charges for the local loop can be.
What is a local loop?
The local loop is the cable that runs from your office to the phone companies' central office giving you a direct connection to the carriers equipment.
Are Internet Protocols (IP) included with my T1 service?
One external IP address and 254 usable private IP addresses or five static.
I need six T1's installed at one location is a T-3 feasable?
Whenever a business is looking at six or more multiple T-1's installed at a single location a T-3 is probably more cost effective.
What data services can a T-3 support?
T1 and T3 lines can support video, audio, and data transmissions.
Can I get a fractional T-3?
Fractional T-3's are available, customers who need speeds of 10 megabits or 100 megabitds per second are starting to opt for Ethernet.
How long does it take to install Ethernet?
Dark fiber already in the ground is drenched to the point of service and facilities are installed. When the fiber gets turned up it is then referred to as lit fiber. Because of the the amount of work associated with Metro Ethernet usually entire buildings are lit and it can take up to (and sometimes more) than 120 days, but well worth the wait in benefits.
What does Ethernet run across?
A fiber optic network.
What does baseband and broadband mean?
A baseband network has a single channel that is used for communication between stations. Ethernet specifications which use BASE in the name refer to baseband networks.
A broadband network is much like cable television, where different services communicate across different frequencies on the same cable. Broadband communications would allow a Ethernet network to share the same physical cable as voice or video services. 10BROAD36 is an example of broadband networking.
What is 10BASE5?
10BASE5 is the original Ethernet backbone, and is occasionally referred to as thicknet or thick Ethernet because of the thick 50 ohm coax that was used as the physical medium. 10BASE5 is a bus topology that uses transceiver cables to attach stations to the central 10BASE5 cable.
- Maximum segment length: 500 meters
- Maximum number of segments connected with repeaters: 5 (2500 meters)
- Maximum attachments per segment: 100
- Minimum separation between attachments: 2.5 meters
What is 10BASE2?
10BASE2 is designed as a smaller and less expensive alternative to 10BASE5, and is sometimes referred to as Thinnet or Thin Ethernet because of the much smaller cables. 10BASE2 is also a bus topology, but each of the workstations use a 'T' BNC connector to connect workstations to the central bus.
- Maximum segment length: 200 meters
- Maximum number of segments connected with repeaters: 5 (1000 meters)
- Maximum attachments per segment: 30
- Minimum separation between attachments: .5 meters
What are the different physical Ethernet network types?
- 10BASE5 - 10BASE5 is the original design of the traditional Ethernet backbone, designed to be left in place permanently or for extended periods.
- 10BASE2 - 10BASE2 is the original design for a departmental or workgroup sized Ethernet environment. It is designed to be simple, inexpensive, and flexible as people and stations move.
- 10BROAD36 - 10BROAD36 is a seldom used Ethernet specification which uses a physical medium similar to cable television, with CATV-type cables, taps, connectors, and amplifiers.
- 1BASE5 - 1BASE5 is a specification of Ethernet that runs at 1 Mb/s over twisted pair wiring. This physical topology uses centralized hubs to connect the network devices.
- 10BASE-T - 10BASET provides Ethernet services over twisted pair copper wire.
- FOIRL - Fiber Optic Inter-Repeater Link - This specification of the 802.3 standard defines a standard means of connecting Ethernet repeaters via optical fiber.
- 10BASE-F - 10BASE-F is a set of optical fiber medium specifications which define connectivity between devices.
- 100BASE-T - 100BASE-T is a series of specifications that provides 100 megabit speeds over copper or fiber. These topologies are often referred to as Fast Ethernet.
- Gigabit Ethernet - Gigabit Ethernet provides speeds of 1000 Mb/s over copper and fiber.
Some of the physical Ethernet types as defined in the 802.3 specification are:
