◦ T1num—T1 controller number.
•
If specifying a virtual interface, the number range varies, depending on interface type.
•
When specifying a virtual tributary group, the naming notation is rack/slot/module/port/vtg/vt. The slash
between values is required as part of the notation. An explanation of each component of the naming
notation is as follows:
◦ rack—Chassis number of the rack.
◦ slot—Physical slot number of the line card.
◦ module—Module number or subslot (for a SPA). A physical layer interface module (PLIM) is
always 0.
◦ port—Physical port number of the interface.
◦ vtg—Virtual tributary group.
◦ vt—Virtual tributary instance.
The controller t1 command is used in configurations in which the router is intended to communicate
with a T1 fractional data line. The controller t1 command is available only on channelized SPAs.
Use the mode command in T3 configuration mode to specify the mode for each T3 port.
To view the status of the controllers, use the show controllers t1 command.
If the T1 framing type is super frame (SF), you should consider disabling yellow alarm detection as the
yellow alarm can be incorrectly detected with SF framing.
Serial interface may flap and eventually, go down if yellow alarm detection is not disabled on its T1
controller configured with SF framing.
Task ID
OperationsTask ID
read, writeinterface
Examples
The following example shows how to enter T1 configuration mode for a controller:
RP/0/RSP0/CPU0:router(config)# controller t1 0/1/0/0/1
RP/0/RSP0/CPU0:router(config-t1)#
Related Commands
DescriptionCommand
Sets the mode of the T3/E3 or T1/E1 controller.mode, on page 1029
Displays information about the T1 links and hardware and software
drivers for the T1 controller.
show controllers t1, on page 1046
Cisco ASR 9000 Series Aggregation Services Router Interface and Hardware Component Command Reference,
Release 5.3.x
975
T3, E3, T1, E1 Controller Commands on the Cisco ASR 9000 Series Router
controller t1
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