| BellSouth BusinessSM Integrated Services Digital Network (ISDN) allows a single
telephone line to carry voice, video and data simultaneously to offer you more efficient
and affordable service. With ISDN, you even have the option of combining available
channels to obtain additional bandwidth when you need it. We offer two types of ISDN
scaled to meet your needs: Basic Rate ISDN (BRI) and Primary Rate ISDN (PRI). BRI has two
channels (B channels) for carrying voice, video or data, and a third channel (the D
channel) that carries the call set-up information and low-speed packet data. Each of the B
channels is capable of speeds as high as 64 Kbps. For applications that require more
bandwidth, such as videoconferencing or higher-speed Internet access, the B channels can
be combined to offer up to 128 Kbps. In addition, multiple phone numbers can be assigned
to one ISDN line. PRI uses the same digital technology, but combines 23 B channels with
one D channel. PRI service offers 1.54 Mbps of bandwidth, the equivalent of a T-1 line. Bandwidth for voice, data and video
applications can be allocated dynamically, on a call-by-call basis. So the same channels
used for voice calls one minute can be re-allocated for a videoconference the next. This
enables you to use your resources more efficiently and economically by allowing a single
telephone line to carry voice, video and data.
Features:
- All-digital service
- BRI for speeds up to 128 Kbps or PRI
for speeds up to 1.54 Mbps
- Integrated voice, video and data
- Flexible capacity on demand
- Utilizes existing wiring
Benefits:
- Make more efficient use of network
and equipment: Transmit voice, video and data simultaneously. With PRI, you get the added
benefit of being able to dynamically allocate calls using bandwidth for voice calls if
desired, or for bandwidth-intensive applications like videoconferencing when needed.
- Improve customer service: Since ISDN
permits multiple calls to be received over a single line, customers encounter fewer busy
signals.
- Increase productivity: Perform voice
and data functions simultaneously.
- Increase transmission accuracy and
speed: Since ISDN operates over a digital network, errors in data transmission are
reduced. Data is sent at higher speeds than with analog modems.
- Improve network connectivity: With
ISDN, multiple locations can share information without the need for a dedicated line. In
addition to LAN-to-LAN communications, ISDN also makes data communications from remote or
home office locations faster and more flexible.
- Save money: ISDN requires no
specialized expensive cabling. It operates over twisted-pair wiring — the same sort
of wiring used for everyday telephone service.
Sample Applications:
- One line, multiple numbers: A group
of physicians can share a receptionist and a phone system. By using ISDN and Multiple
Directory Numbers, a single line can provide each physician with his/her own incoming
number. The receptionist will know which doctor the call is for even before answering the
phone. Since ISDN permits multiple calls to be received over a single line, patients may
also encounter fewer busy signals.
- More flexible videoconferencing:
With ISDN, the same line used for voice calls can also be used for videoconferencing.
- Extended network: If your company
has branch offices or workers in remote locations, ISDN can provide high-speed connections
to your network. The bandwidth is used only when needed and is available for other
applications the rest of the time. You can connect LANs across a campus, or across the
country.
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