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2-34 Hardware Description
Vanguard 6455 Option Cards
Figure 2-44. E1 Card Impedance Jumper Locations
The TRing (the coax
shield for the Tx pair) is
grounded directly.
The Rring (the coax
shield for the Rx pair) is
grounded directly.
This configuration
may be used with
certain unbalanced
75Ω coax E1
networks.
Note
Use this configuration
only if the network
provider requests it.
The ITU requires this
setting.
The TRing (the coax
shield for the Tx pair) is
grounded directly.
The Rring (the coax
shield for the Rx pair) is
grounded through a
decoupling capacitor.
This configuration
may be used with
certain unbalanced 75
ohm coax E1
networks.
Note
This setting may be
required in Australia
and New Zealand.
Description Use Jumper Configuration
Rx Tx
Rx Tx
Rx
Tx
Rx
Tx