PurposeCommand or Action
Inverting Data on the T1/E1 Interface
If the interface on the channelized SPA is used to drive a dedicated T1 line that does not have B8ZS encoding,
you must invert the data stream on the connecting CSU/DSU or on the interface. Be careful not to invert data
on both the CSU/DSU and the interface, as two data inversions will cancel each other out.
To invert data on a T1/E1 interface, use the following commands:
SUMMARY STEPS
1.
Router# configure terminal
2.
Router(config)# interface serial slot/subslot/port
3.
Router(config-if)# invert data
DETAILED STEPS
PurposeCommand or Action
Enters global configuration mode.Router# configure terminal
Step 1
Selects the serial interface and enters interface configuration mode,
where:
Router(config)# interface serial
slot/subslot/port
Step 2
Example:
• slot/subslot/port —Specifies the location of the controller.
For addressing information, refer to the Specifying the Physical
Address for Controller and Interface Configuration, on page 292.
Inverts the data stream.
Router(config-if)# invert data
Step 3
What to Do Next
Use the show running configuration command to verify that invert data has been set:
router# show running configuration
interface Serial6/0/0:0
no ip address
encapsulation ppp
logging event link-status
load-interval 30
invert data
no cdp enable
ppp chap hostname group1
ppp multilink
ppp multilink group 1
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS
XE Everest 16.5
314 OL-14127-17
Configuring the 1-Port Channelized OC-3/STM-1 SPA and 1-Port Channelized OC-12/STM-4 SPA
Optional Configurations
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