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Panasonic DBS 40 Operating Manual Page 70

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Section 700 - Operation
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In addition, one Tl Cable (VB-43564) is required to install a Tl in a double
cabinet if the Tl card is located in the slave cabinet.
To install two Tls in a double cabinet, you must have 2 Tl Trunk Cards and
2 T1 MDF Cards.
The installer must provide a Channel Service Unit (CSU) that complies
with FCC Part 1.5 and Part 68. The CSU is installed between the DBS and
the public network. The CSU provides alarm, diagnostic. :tnd monitoring
functions. as well as network protection.
Fractional Tl allows you to use only a portion of the 24 channels provided
on the Tl card.
Though each Tl Interface provides 24 trunk channels, Tl trunks do not
increase the overall trunk capacity of the DBS. Each Tl channel subtracts
from the total number of analog trunks that can be installed. Furthermore.
the number of analog trunks that can be used may be decremented in
quantities of 1 or 8.
For instance, if you are installing a Tl in a DBS 96 and you only want to
use 12 Tl channels, the logical number of analog trunks that would be
available is 20 (32 - 12 = 20).
With CPC-B 5.00 and later, the number of analog trunks available are
decremented in quantities of 1. With CPC-B earlier than 5.00, the number
of analog trunks must be decremented in quantities of 8; the actual number
of analog trunks that can be used is 16:
(32 total trunks - 16 (two g-trunk increments) = 16.j
The current version of the Tl supports voice communications only. Data
can be transmitted only if it reaches the Tl in analog form. Examples of
analog data that can be transmitted over the Tl include fax transmissions
and PC files that have been converted into analog form using a modem.
Chapter 2. System Features


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