
Appendix C ISDN overview 543
Networking Configuration Guide
S Reference Point
The S reference-point connection provides either a point-to-point or point-to-multipoint digital
connection between BCM and ISDN terminal equipment (TE) that uses an S interface. Refer to
Figure 152.
S loops support up to seven ISDN DNs, which identify TE to the BCM system.
Figure 152 S reference point
T Reference Points
The T reference-point connections provide a point-to-point digital connection between the ISDN
network and BCM. Refer to Figure 153.
A T loop provides lines that can be shared by all BCM telephones, peripherals and applications,
and ISDN TE.
In
spec
t F
O
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C
a
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Insp
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t FO
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llers
M
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Inspe
ct F
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allers
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point-to-point
ISDN TE
ISDN TE
ISDN TE
(with terminating resistors)
ISDN TE
(with terminating resistors)
BCM
s
s
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