Nortel BCM50 Installation Manual page 8

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PRI services and features
These are the services and features provided over PRI lines:
• Call-by-call service selection (NI protocol)
• Emergency 911 dialing, internal extension number transmission
• access to Meridian 1 private networking (SL-1 protocol)
BRI services and features
These are the services and features provided over BRI lines:
• data transmission at speeds up to 128 kbps per loop (depending on the bandwidth supported by
your service provider)
• shared digital lines for voice and data ISDN terminal equipment
Enterprise Edge Basic Rate Interface (BRI) also support D-channel packet service between a
network and terminal connection. This allows you to add applications such as point-of-sale
terminals (POSTA) without additional network connections. Connecting a POSTA allows
transaction terminals (devices where you swipe credit or debit cards) to transmit information using
the D channel of the BRI line, while the B channels of the BRI line remain available for voice and
data calls. A special adapter links transaction equipment, such as cash registers, credit card
verification rigs, and point-of-sale terminals, to the X.25 network, which is a data communications
network designed to transmit information in the form of small data packets.
To support the D-packet service, your ISDN network and financial institution must be equipped
with a D-packet handler. To convert the protocol used by the transaction equipment to the X.25
protocol, your ISDN network must also be equipped with an integrated X.25 PAD which works
with the following versions of X.25: Datapac 32011, CCITT, T3POS, ITT and API. The ISDN
service package you order must include D-packet service (for example, Package P in the United
States; Microlink™ with D-channel in Canada).
Your service provider supplies a Terminal Endpoint Identifier (TEI) and DN to support D-packet
service. The TEI is a number between 00 and 63 (in Canada, the default range is 21-63). Your
service provider may also supply you with a DN to program your D-packet device. The DN for
D-packet service becomes part of the dialing string used by the D-packet to call the packet handler.
Service provider features
Enterprise Edge supports the following ISDN services and features offered by ISDN service
providers:
• D-channel packet service (BRI only) to support devices such as transaction terminals.
Transaction terminals are used to swipe credit or debit cards and transmit the information to a
financial institution in data packets.
• Calling number identification (appears on both Enterprise Edge sets and ISDN terminal
equipment with the capability to show the information)
ISDN overview