3Com 3C13755-US - Router 5642 Installation Manual page 24

22 C 2: I
HAPTER NTRODUCING
R 5012 SIC
OUTER S
Table 19 lists status descriptions of the 2-port ISDN S/T SIC and 2-port ISDN U SIC
LEDs.
Table 19 2-Port ISDN S/T SIC and 2-Port ISDN U SIC LEDs
B1
B2
ACT
ON
For ISDN, "active" describes the action or process that a terminal device uses to
synchronize the network clock.
To decrease power consumption of the exchange device, the terminals and
network port should be deactivated.
The 2-port ISDN S/T SIC and 2-port ISDN U SIC use telephone cable with a ferrite
core. This cable ships with the 2-port ISDN S/T SIC and 2-port ISDN U SIC.
To avoid plugging the cable into the wrong connectors and damaging the SIC or
the router host, identify the mark on the SIC before connecting the cable.
When the 2-port ISDN S/T SIC and 2-port ISDN U SIC interface cables are used
outdoors, 3Com recommends that you install a lightning arrester on the input end
of the cable to minimize the risk of lightning damage.
To connect the cable to the 2-port ISDN S/T SIC and 2-port ISDN U SIC:
1 Confirm the type of the ISDN line.
2 Power off the router.
3 Connect the cable.
For the 2-port ISDN S/T SIC — If the line uses the ISDN U interface, use NT1 for
conversion. Connect one end of the telephone cable into the BRI S/T port of
the 2-port ISDN S/T SIC and the other end into the NT1.
If the line uses the ISDN S/T interface, directly insert the cable end with ferrite
core into the BRI S/T port of the 2-port ISDN S/T SIC and the other end into the
ISDN S/T port.
For the 2-port ISDN U SIC — If the line uses the ISDN U interface, directly insert
the cable with ferrite core into the BRI U port of the 2-port ISDN U SIC interface
card and the other end into the ISDN U port.
If the line uses the ISDN S/T interface, contact your Service representative and
replace the interface card with 2-port ISDN S/T SIC.
Off: The B1 channel is idle.
Flashing yellow: The B1 channel is occupied
and data is being transmitted.
Off: The B2 channel is idle.
Flashing yellow: The B2 channel is occupied
and data is being transmitted.
Off: The channel is not active
Flashing yellow: The channel is activating
Green: The channel is active.
Off: The power is off.
Yellow: The power is on.