Zhone Technologies 900 - Manual (Page 124)

5-10 IMACS System Release 5.1.6 Data Cards
Model No. Running Head BRI Card User Screens and Settings BRI Card
Notice!
UL STATEMENT
OPERATION OF THIS INTERFACE IS LIMITED TO INTER-BUILDING
CONNECTIONS LESS THAN 1,000 METERS.
5.3.3.1 Card Jumper/Switch Settings
The BRI-ST*8 Card has three sets of jumpers (JPx01, JPx02, and JPx04) (JPX03 has no
jumpers) for each of its eight BRI ports. In these numbers, the “x” indicates card port numbers
1 through 8. You must set these jumpers before using the BRI-ST*8 Card. The jumpers are
shown in Figure 5-6.
Receive termination is fixed at 100 ohms. Jumpers JPx02 are installed as the default to apply
a 100-ohm transmit termination, or the jumper can be removed to provide no termination. The
actual network design determines the setting of these terminations.
Jumpers JPx01 and JPx04 are installed (ON) to provide either internal (INT) or external
(EXT) -48V power to the phantom leads, based on the setting of JP5 and JP6 (see the markings
on the card). When the JPx01 and JPx04 jumpers are ON, they provide power out to the cable
pair. When OFF, there is no power out on the cable pair.
In setting up the BRI S/T circuit, the operator chooses whether or not to provide - 48V power
across the transmit and receive leads of each port (via jumper pairs JPx01 and JPx04). Each
jumper is ON to supply power, otherwise the jumper is OFF.
Then, if the card is supplying power, the operator chooses whether that power is to be provided
externally (that is, via pins 25 and 50 of the 50 pin Amphenol connector on the front panel) or
internally from the IMACS system via the backplane power bus (which can be generated from
the AC power input using an 8903 or 8905 power converter or from an external DC source via
pins Va, Vb or Vn on the chassis terminal block). This is done by setting both JP5 and JP6 to
either INTERNAL or EXTERNAL.
WARNING!
If external power is used, jumpers JP5 and JP6 must be set to EXTERNAL
mode. Failure to do so could damage or destroy the card or system.