Zhone Technologies 900 - Manual (Page 117)

Data Cards IMACS System Release 5.1.6 5-3
BRI Card BRI Card Descriptions
used for (CO) Central Office testing on sealing current sink. This current prevents wiring
splice corrosion between the card and external equipment, thereby maintaining the integrity
of the connection.
5.2.2.1 Card Jumper/Switch Settings
Notice!
There are two different sets of jumpers located near the front edge of the BRI
SC card. The first set is for LT/NT termination. These jumpers are labeled
on the circuit board as JP101, JP201...JP801, and are located closest to the
front panel.
The second set of jumpers is to select sealing current of either 15 mA or 7.5
mA for each port. They are labeled on the circuit board as JP102,
JP202…JP802, and are located immediately behind the LT/NT jumpers.
Terminal Type Selection
You must set several jumpers on the BRI-SC U*8 Card to configure its individual ports for
NT (Network Terminal) or LT (Line Terminal) operation. Figure 5-2 shows these jumpers. In
addition, you must also ensure that the TERMINAL setting in the User Interface screen agrees
with the physical jumper settings (jumper settings must match the Terminal mode).
These cards are shipped with LineTerminal as the default (jumpers open). To change
termination to the Network Terminal mode, install the shorting jumpers across the pins labeled
J101 to J801 on both sets of pins next to the front edge of the card, as shown in Figure 5-2. In
these numbers, the first digit (e.g., 101) is the port number indicator.
The interface can be set individually for the lt feature but, once set, remain in the lt mode until
the jumpers are removed. If jumpers are removed then the ports are set to NT (Network
Terminal) mode.