ADTRAN 1200275L1, Руководство пользователя

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Chapter 7. Configuring the Network Port
61200275L1-1 TSU IQ+ User Manual 7-3
Clock Source (CLK SOURCE)
Select the clock source to be derived from the network, from the
unit’s internal clock, or from clock recovered from either the DTE
(
V.35 ) or
DSX-1
port. The selected clocking option designates the
clock source for transmission. Clocking necessary for receiving data
is recovered from incoming data. This option is most commonly set
to
F
ROM
N
ETWORK
.
Choices: I
NTERNAL
, F
ROM
N
ETWORK
, B
ASE
DTE , and B
ASE
DSX-1 .
Line Buildout (LBO)
Select the line buildout for the network interface. In A
UTO
mode,
the TSU IQ+ sets the LBO based on the strength of the receive
signal. Options: A
UTO
, 0 , 7.5 , 15 , and 22.5
dB
.
Rx Sensitivity (RX GAIN)
Select the desired receiver sensitivity setting. The factory default is
N
ORMAL
, which is adequate for most applications. The extended
setting should be used only in applications where the N
ORMAL
setting is not sufficient. If the receive signal strength is less than
30 dB, choose
E
XTENDED
.
Channel Bandwidth (CHANNEL RATE)
Set the channel bandwidth for 56 or 64
kbps
.
Transmit PRM
Enabling performance report messages (PRM) allows the TSU IQ+
to send messages across the facility data link (FDL) per ANSI
T1.403. The terminating device at the telco may use this
information for management of the T1 loop.
The TSU IQ+ supports PRM messages per AT&T Pub 54016 which
is a poll/response type protocol. Because of this poll/response
nature, the transmit PRM option does not disable the TSU IQ+ from
processing or responding to 54016-type messages.
Choices:
Y
ES
or N
O
.