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Chapter 7 ISDN
Figure 9 S reference point
BCM
T Reference Points
The T reference point connections provide a point-to-point digital connection between the ISDN
network and BCM. Refer to
A T loop provides lines that can be shared by all BCM telephones, peripherals and applications,
and ISDN TE.
Figure 10 T reference point
ISDN
A T loop can be used in combination with an S loop to provide D-packet service for a point-of-sale
terminal adapter (POSTA) or other D-packet device. D-packet service is a 16 kbps data
transmission service that uses the D-channel of an ISDN line. The T and S loops must be on the
same physical module.
N0060609 0.3
N0060609 0.3
point-to-point
s
s
Figure
10.
network
connection
ISDN TE
(with terminating resistors)
ISDN TE
ISDN TE
T
BCM
ISDN TE
(with terminating resistors)
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