Matrix Telecom SIMADO GBR42 System Manual page 89

• A BRI line consists of two B-channels, which can be viewed as
two logical pipes supported by a D-channel as shown below.
• BRI is intended to be the access point for customer premise
equipment (CPE) such as ISDN telephones, ISDN Fax and other
ISDN terminal equipment.
• Maximum Eight ISDN devices can be connected to this single
physical line, and all the devices share the B-channels and D-
Channel. Individual devices are distinguished through the use of
Multiple Subscriber Numbers (MSNs), with a different ISDN
number assigned to each device. D-channel signals automatically
route communications to appropriate ISDN device.
• Point-to-Point BRI configuration and Point-to-Multipoint BRI
configurations are shown below in the figure.
• In a Point-to-Point physical configuration, the NT (NT1 or NT2) and
the TE (TE1 or TA) can be up to 1 Km apart.
• There are two configurations possible in Point-to-Multipoint
configuration viz. short passive bus configuration and extended
SIMADO GBR42 V1 System Manual
Matrix
89