Nortel BCM50 Configuration Manual page 543

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
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.
ISDN TE
(with terminating resistors)
point-to-point
s
s
Figure 153.
Appendix C ISDN overview
ISDN TE
ISDN TE
(with terminating resistors)
ISDN TE
Networking Configuration Guide
543