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ISDN (Integrated Services Digital Network) is a high-speed switched digital telephone network. The regular phone network is analog. Being digital, each ISDN line supports up to 128 Kbps - just over 4 times faster than analog modems. Using ISDN for your Internet connection makes the whole 'Net seem much more responsive. ISDN is a cost-effective solution for connecting mid-size LANs to the Internet.
Physically, an ISDN line runs on the same type of wire as your regular phone. If you have multiple standard lines running into your home or business, you can easily have one changed over to an ISDN line, or your telephone company can run a new line.
Electrically, an ISDN line consists of "channels". Standard ISDN service uses 2 B-channels and 1 D-channel. Each B-channel supports up to 64 Kbps. The D-channel is used for dialing. The 2 B-channels are combined (the technical term is bonded) to deliver up to 128 Kbps. Thus, the standard ISDN service is called 2B+D.
ISDN is extremely flexible. The telephone company can program each channel to handle voice, data, or a combination of voice and data. For the vast majority of Internet ISDN connections, data programming is used. The technical term for this programming is provisioning.
To use ISDN for your Internet connection, you need an ISDN phone line and an ISDN modem (technically called a terminal adapter) or an ISDN router. An ISDN modem is used to connect individual PCs and Macs. An ISDN router connects a LAN.
ISDN Channel Hours
ISDN connections are measured in channel-hours. An ISDN channel-hour is defined as one hour of connect time with one ISDN B-channel (64kbps). An hour of connect time with both channels (128kbps) equals two channel-hours.
Telco ISDN Line Pricing
Bell South offers unmetered ISDN service.
Package Information
Bell South ISDN Line Costs
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Package
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Setup*
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Monthly*
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2 Year*
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S
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$190
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$63.20
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$59.20
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EZ1
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$194
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$63.20
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$59.20
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EZ1A
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$197
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$65.20
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$61.20
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EZ2
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$198
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$65.20
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$61.20
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EZ2A
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$200
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$67.20
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$63.20
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*Other Charges may apply
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ISDN
Equipment
For individual dial-in connections, Junctionbox works with all major ISDN adapters. For LAN connections, we recommend, and can supply, the Netopia R3100 series of ISDN dial-up routers.
Ordering Your ISDN Line
If you are in the Bell South service area...
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Residential - 800-858-9413
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Small Business - 800-753-8172
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Large Business - Contact
your Bell South account rep.
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Other ISDN
FAQs
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