Specifications

Reference Guide
7-13
WAN Card WAN Module Descriptions
Figure 7-20. Removal of Plastic Standoffs - 811 WAN Module
When assembling and installing the module on the WAN card,
it is our advice that the plastic
standoffs be removed to eliminate the possibility of errors on the associated T1 or E1
lines.
For this reason, the plastic standoffs are no longer being supplied by the manufacturer
for new WAN modules.
7.3.1.6 Setting Jumpers for Balanced or Unbalanced E1 Operation
You can configure CEPT E1 links for either 120-ohm balanced or 75-ohm unbalanced
operation by setting the jumpers on the DSX/CEPT module as previously described, setting
them or the E1 Interface Adapter Panel, or setting both of these units. Refer to Table 7-1 for
information on which revisions of the DSX/CEPT module have jumpers. The adapter panel is
a replacement for the cover on the front-loading chassis with power supplies on the side.
Figure 7-21 shows the jacks and jumpers on this panel.
Table 7-1. Balanced/Unbalanced E1 Link Jumper Compatibility
Module Type Rev. A Rev. B Rev. C Rev. D Rev. E Rev. F
811 Yes Yes n/a Yes No No
81120 No No n/a n/a n/a n/a
Side View
Remove all plastic standoffs