Cabletron Systems CSX400 User Manual
Page 71
T1 Port Configuration
4-7
CSX WAN Configuration
In this window you will see the following Þelds:
Line Status
Displays the status of the port. The status can be one of the following:
¥
Inactive Ñ
The connection through this port is not active.
¥
OK
Ñ The port is the active port and the connection is operational.
¥
In Alarm
Ñ The port is the active port and the connection has experienced a
failure.
The left side of this portion of the window is color-coded to indicate the line
status: Blue for Inactive; Green for OK; and Red for In Alarm.
Port 1
Displays the port type, i.e., Fractional T1.
Circuit Id
The Circuit Id Þeld lets you enter a character string Ñ speciÞed by the circuit
vendor as a circuit identiÞer Ñ for troubleshooting purposes.
Line Code
Displays the line coding for the Full T1 line. The available selections are B8ZS and
AMI. The default for this Þeld is B8ZS. If AMI is chosen, the line code selection on
each active interface cannot be None (see
for more information). The line code should be set according to your
WAN service providerÕs instructions.
Line Build Out
Displays the value of the Line Build Out setting, which controls the amount of
attenuation of the T1 signal. The possible values in this Þeld are 0 db, -7.5 db,
-15 db
, and Unknown. You should set Line Build Out at the device according to
your WAN service providerÕs instructions.
Framing Type
Displays the type of service you are using over your T1 line (i.e., ESF Ð Extended
Super Frame DS1, or D4 Ð AT&T D4 format DS1). You should set the Framing
Type at your device according to your WAN service providerÕs instructions.
Clock Source
Displays the T1 Transmit Clock Source. Loop Timing indicates that the recovered
receive clock is used as the transmit clock. Local Timing indicates that an internal
NOTE
While it is possible for the next three Þelds Line Build Out, Framing Type, and Clock
Source
to be set remotely on a CSX, Cabletron recommends against it, as you may
inadvertently interrupt a working connection. All three should be set at the hardware
level with switches on the device. For more information on how to set these switches, see
your hardware documentation.