Posted on August 29, 2011 6:34 am

Internet Access

Because San Antonio, Texas already has plenty of Internet Service Providers in the area, we at SNX can only provide you support that your ISP cannot provide professionally enough.

Internet Access is a privilege and an abundance service of, in many flavors and choices. We have residential and business class tiers of service through Time Warner Cable, AT&T (SBC), GrandeCom, QWest, Verizon, T-Mobile, Sprint, Clearwire, HugeNet,  Each of these companies offer services using various communications equipment. We support most of it, and if there is something we haven’t seen/used before, we learn it faster than some of the more professional operators

Internet access is the means by which individual terminals, computers, mobile devices, and local area networks are connected to the global Internet. Internet access is usually sold by Internet Service Providers (ISPs) that use many different technologies offering a wide range of data rates to the end user.  Networking is a basic concept of inter-connecting electronic devices to one another.  With a gateway access to a more vast interconnected world (the internet) we can communicate with a smaller world.  SNX understands this technology inside and out.  Your wireless issues are just seagulls, flying in pompay during a solar flare


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  • Forth Generation
  • HSPA+: 21 to 672 Mbit/s down; 5.8 to 168 Mbit/s up
  • Mobile WiMAX (802.16): 37 to 365 Mbit/s down; 17 to 376 Mbit/s up
  • LTE: 100 to 300 Mbit/s down; 50 to 75 Mbit/s up
  • LTE-Advanced: 100 Mbit/s moving to 1 Gbit/s not moving
  • MBWA: (802.20): 80 Mbit/s


Local area networks (LANs) provide Internet access to computers and other devices in a limited area such as a home, school, computer laboratory, or office building, usually at relatively high data rates that typically range from 10 to 1000 Mbit/s. There are wired and wireless LANs. Ethernet over twisted pair cabling and Wi-Fi are the two most common technologies used to build LANs today, but ARCNET, Token Ring, Localtalk, FDDI, and other technologies were used in the past.

Most Internet access today is through a LAN, often a very small LAN with just one or two devices attached. And while LANs are an important form of Internet access, this begs the question of how and at what data rate the LAN itself is connected to the rest of the global Internet. The technologies described below are used to make these connections.

Dial-up access uses a modem and a phone call placed over the public switched telephone network (PSTN) to connect to a pool of modems operated by an ISP. The modem converts a computer’s digital signal into an analog signal that travels over a phone line’s local loop until it reaches a telephone company’s switching facilities or central office (CO) where it is switched to another phone line that connects to another modem at the remote end of the connection.

Broadband access

The term broadband includes a broad range of technologies, all of which provide higher data rate access to the Internet. These technologies use wires or fiber optic cables in contrast to wireless broadband described later. Integrated Services Digital Network (ISDN), a switched telephone service capable of transporting voice and digital data, is one of the oldest Internet access methods. ISDN has been used for voice, video conferencing, and broadband data applications. ISDN was very popular in Europe, but less common in North America. Its use peaked in the late 1990s before the availability of DSL and cable modem technologies

Leased lines are dedicated lines used primarily by ISPs, business, and other large enterprises to connect LANs and campus networks to the Internet using the existing infrastructure of the public telephone network or other providers. Delivered using wire, optical fiber, and radio, leased lines are used to provide Internet access directly as well as the building blocks from which several other forms of Internet access are created.

Cable Internet or cable modem access provides Internet access via Hybrid Fiber Coaxial wiring originally developed to carry television signals. Either fiber-optic or coaxial copper cable may connect a node to a customer’s location at a connection known as a cable drop. In a cable modem termination system, all nodes for cable subscribers in a neighborhood connect to a cable company’s central office, known as the “head end.” The cable company then connects to the Internet using a variety of means – usually fiber optic cable or digital satellite and microwave transmissions. Like DSL, broadband cable provides a continuous connection with an ISP.

Digital Subscriber Line (DSL) service provides a connection to the Internet through the telephone network. Unlike dial-up, DSL can operate using a single phone line without preventing normal use of the telephone line for voice phone calls. DSL uses the high frequencies, while the low (audible) frequencies of the line are left free for regular telephone communication. These frequency bands are subsequently separated by filters installed at the customer’s premises.

Fiber-to-the-home (FTTH) is one member of the Fiber-to-the-x (FTTx) family that includes Fiber-to-the-building or basement (FTTB), Fiber-to-the-premises (FTTP), Fiber-to-the-desk (FTTD), Fiber-to-the-curb (FTTC), and Fiber-to-the-node (FTTN). These methods all bring data closer to the end user on optical fibers. The differences between the methods have mostly to do with just how close to the end user the delivery on fiber comes. All of these delivery methods are similar to hybrid fiber-coaxial (HFC) systems used to provide cable Internet access.  Power-line Internet, also known as Broadband over power lines (BPL), carries Internet data on a conductor that is also used for electric power transmission. Because of the extensive power line infrastructure already in place, this technology can provide people in rural and low population areas access the Internet with little cost in terms of new transmission equipment, cables, or wires. Data rates are asymmetric and generally range from 256 kbit/s to 2.7 Mbit/s.

Wi-Fi is the popular name for a “wireless local area network” that uses one of the IEEE 802.11 standards. It is a trademark of the Wi-Fi Alliance. Individual homes and businesses often use Wi-Fi to connect laptops and smart phones to the Internet. Wi-Fi Hotspots may be found in coffee shops and various other public establishments. Wi-Fi is used to create campus-wide and city-wide wireless networks.

Satellites can provide fixed, portable, and mobile Internet access. It is among the most expensive forms of broadband Internet access, but may be the only choice available in remote areas. Data rates range from 2 kbit/s to 1 Gbit/s downstream and from 2 kbit/s to 10 Mbit/s upstream. Satellite communication typically requires a clear line of sight, will not work well through trees and other vegetation, is adversely affected by moisture, rain, and snow (known as rain fade), and may require a fairly large, carefully aimed, directional antenna.

Mobile broadband is the marketing term for wireless Internet access delivered through mobile phone towers to computers, mobile phones (called “cell phones” in North America and South Africa), and other digital devices using portable modems. Some mobile services allow more than one device to be connected to the Internet using a single cellular connection using a process called tethering. The modem may be built into laptop computers, tablets, mobile phones, and other devices, added to some devices using PC cards, USB modems, and USB sticks or dongles, or separate wireless modems can be used.