Cisco ASR 9000 Series Manuale di configurazione - Pagina 9
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Configuring Clear Channel T3/E3 and Channelized T3 and T1/E1 Controllers on the Cisco ASR 9000 Series Router
Table 2
Parameter
Maintenance data link (MDL) messages
(T3 only)
National reserved bits for an E3 port
(E3 only)
When configuring clocking on a serial link, you must configure one end to be internal, and the other
Note
end to be line. If you configure internal clocking on both ends of a connection, framing slips occur. If
you configure line clocking on both ends of a connection, the line does not come up.
Default Configuration Values for T1 and E1 Controllers
Table 3
Table 3
Parameter
Frame type for the data line
Detection and generation of T1 yellow
alarms.
(T1 only)
Clocking for individual T1 and E1 links
Cable length
(T1 only)
Transmission of ANSI T1.403 or AT&T
TR54016 once-per-second performance
reports through Facility Data Link (FDL)
for a T1 channel
(T1 only)
National reserved bits for an E1 port
(E1 only)
OL-32684-01
T3 and E3 Controller Default Configuration Values
describes the default configuration parameters that are present on the T1 and E1 controllers.
T1 and E1 Controller Default Configuration Values
Cisco ASR 9000 Aggregation Services Router Interface and Hardware Component Configuration Guide
Information About T3/E3 Controllers and Serial Interfaces
Default Value
disable
enable, and the bit pattern
value is 1.
Default Value
For T1: extended
superframe (esf)For E1:
framing with CRC-4 error
monitoring capabilities
(crc4).
Yellow alarms are
detected and generated on
the T1 channel.
internal
For cablelength long
command: db-gain-value:
gain26; db-loss-value:
0db.
For cablelength short
command: 533 feet.
disable
0 (which corresponds to
0x1f in hexadecimal
format)
Configuration File Entry
mdl transmit {idle-signal |
path | test-signal} {disable |
enable}
national bits {disable |
enable}
Configuration File Entry
For T1: framing {sf |
esf}For E1: framing {crc4 |
no-crc4 | unframed
yellow {detection |
generation} {disable |
enable}
clock source {internal |
line}
To set a cable length of
longer than 655 feet:
cablelength long
db-gain-value db-loss-value
To set a cable length of 655
feet or shorter: cablelength
short length
fdl {ansi | att} {enable |
disable}
national bits bits
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