Zhone IMACS 8000, User Manual

Page: 273 / 788

System Cards 8-3
Interface Card Interface Card Descriptions
Figure 8-2.Jumper Arrangements for the T1/E1 External Sync Card
Table 8-1. Jumper Settings for the T1/E1 External Sync Card
8.2.1.4 Equipment Grounding Requirements
When connecting cables from other AC-powered equipment (such as computer terminals) to
the Interface card, make sure the other equipment is properly grounded. Ground
connections are normally provided by the ground (third) prong of an AC plug. Some PCs,
especially portables and laptops, have power supplies with two-pronged plugs; they are not
properly grounded.
When a cable is run from a PC that is not properly grounded to the Interface port of the
system, a high voltage differential (up to 100 VAC) may result between the system and
the PC. This can severely damage the Interface card, PC, or both.
Jumper # Position Results
JP5 Open T1
JP5 Closed E1
JP8 and JP11 Open Balanced
JP8 and JP11 Closed Unbalanced
JP6 and 7 Open Ext1 (T1) 100 Ohms
JP9 and 10 Open Ext2 (T1) 100 Ohms
JP6 and 7 Closed Ext1 (E1) 75 Ohms
JP9 and 10 Closed Ext2 (E1) 75 Ohms
JP2 JP4 JP5
JP5
JP1
JP2 JP4 JP5
JP8
JP6
JP7
JP11
JP10
JP9
JP5
JP1