Appendix D
PRI Technical Notes
ViewStation FX/VS 4000 User’s Guide
184
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P-LINK side of the PRI network interface module.
The other side of the PRI network interface module is called the
P-LINK side
. This side has:
•
A circular slot for a DC power supply
•
Two keyed RJ-45 connectors
•
Two vertical LEDs
Figure 4-1.
PRI Network Interface Module
PRI Network Interface Modules
There are two kinds of PRI network interface modules:
•
T1 - used in North America, Japan, Taiwan, and Hong Kong.
•
E1 - used in Europe and most of the other countries that do not
use the T1.
The T1 interface network module supports twenty-three 64 kbps B
channels and one D channel (channel 24) for signaling. The E1
network interface module supports thirty 64 kbps B channels and
one D channel (channel 16). Therefore, the aggregate data capacity
is:
•
T1 - 1472 kbps
•
E1 - 1920 kbps
The T1 and E1 also have different methods of signaling and framing.
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