Interface cards descriptions
43
SmartNode 1000 and 2000 Series Getting Started Guide
1 • General Information
Figure 22. Two ports connected to the PBX and two ports to the ISDN network
S-Bus line power
Some ISDN terminals are powered through the S-Bus. This is usually the case for ISDN phones but not for
PBXs. If you want to connect such a terminal directly to a port of the IC-4BRV, you must install a PM-48V-
INT (or PM-38V-INT) power supply module. Two steps are required to provide S-Bus line power:
•
Install an internal Line Power Module PM-48V-INT (or PM-38V-INT). This is described in section ,
“Internal PM-48V-INT or PM-40V-INT line power module installation”
on page 116.
•
Configure the IC-4BRV card’s jumper settings. This procedure is described in the following paragraphs.
Line power jumper settings
A set of jumper pins determines how power is supplied to the BRI ports. The jumper pin block is located on
the IC-4BRV interface card underside. See the series of illustrations, which follow.
When the line power module is installed and operating, ports 0
and 1 are always supplied with 40V power. Power output on
ports 2 and 3 is configurable. You must not supply power to a
port configured in
USR mode, i.e. connected to an ISDN NT.
Supply power only to those ports configured in
NET mode where
you want to connect line-powered terminals.
The jumpers are not accessible when the IC-4BRV card is
installed, you must set the jumpers before installing the card in
the SmartNode 2000 Series device.
PBX
3
2
1
0
Bypass
Relay
NT
CAUTION
IMPORTANT
