On-Line Service

ASI Internet Services offers on-line service to promote the business community in the Mid-Michigan area. Internet services are available on a subscription basis. ASI Internet Services provides a variety of Internet connectivity options allowing for access in a wide variety of price ranges.

Dial-Up Access-relates to network client access to a LAN or WAN via telephone lines.

Types of dialup include V.34 and V.90 modem dialup as well as Integrated Services Digital Network (ISDN). Dialup uses special-purpose network protocols like Point-to-Point Protocol (PPP).

As the popularity of the Internet exploded in the 1990s, dialup remained the most common form of Internet access due mainly to its low cost. However, the performance of dialup networking is relatively poor due to the limitations of traditional modem technology. V.90 modem dialup handles less than 56Kbps bandwidth and ISDN handles approximately 128Kbps.

ISDN Access-is a network technology that supports transfer of simultaneous voice and data traffic. Similar to DSL in this respect, an ISDN Internet service works over ordinary telephone lines. ISDN Internet service generally supports data rates of 128 Kbps.

SDSL Access-Symmetric Digital Subscriber Line or SDSL is a commercial-grade DSL solution, suitable for businesses which may be running servers or applications that send out large amounts of data. SDSL does not provide voice capabilities, so an additional phone line must be installed. Uplink and downlink speeds are equivalent, with reliable service along the dedicated line. Generally SDSL solutions will also offer the user a number of static IP addresses.

T1 Access-A T1 (or T-1) line is a dedicated connection supporting data rates of 1.544 Mbps. A T1 line actually consists of 24 individual channels, each of which supports 64Kbits per second. Each 64Kbit/second channel can be configured to carry voice or data traffic. The channels require a digital connection device (CSU/DSU {customer switching unit/digital switching unit}) to connect to four wires to carry the information. The data signal comes into the CSU/DSU and then goes to the router. From there it goes into the master name server and may be routed to other servers. One of these severs may be a modem or terminal server that allows the user to connect to the Internet.

Wireless Access (Coming Summer of 2003) -Wireless broadband systems use radio signals instead of telephone wire (copper, twisted pair), TV cable (hybrid fiber coax cable), or fiber optics to send and receive data and sometimes voice. Wireless providers primarily use what is known as "fixed" wireless technology to provide "last mile" broadband Internet access to residential and business customers. The technology is "fixed" because it relies on a stationary signal base, unlike "mobile" systems that allow users to move from place to place. Mobile wireless alternatives currently include Wireless LANs and Internet connections for some hand held computers and cell phones.

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