AI2524 Router Card User’s Manual
Page 14-2 August 1997
2524UM
To guarantee the ones density requirement on an AMI line using th
FT1/T1 CSU/DSU module, type this in interface configuration mode:
service-module t1 data-coding inverted
This command inverts bit codes by changi ng all 1 bits to 0bits and all
0 bits to 1 bits.
If the timeslot speed is set to 56kbps, this command is rejected be-
cause line density is guaranteed when transmitting at 56kbps. Use this
command with the 64 kbps line speed. If you transmit inverted bit
codes, both CSU/DSUs must have this command configured for suc-
cessful communication.
To enable normal data transmission on a FT1/T1 network, type this in
interface configuration m ode:
service-module tx1 data-coding normal
or
no service-module t1 data-coding inverted
Specify the Frame Type of a FT/T1 Line
To specify the frame type for a line using the FT1/T1 CSU/DSU mod-
ule, type this in interface configuration mode:
service-module t1 framing {sf | esf}
Note: Choose either D4 Super Frame (sf) or Extended Super
Frame (esf).
In most cases, the service provider determines which framing type, ei-
ther esf or sf, is required for your circuit.
Specify the CSU Line Build Out
To decrease the outgoing signal strength to an optimum value for the
telecommunication carrier network, type this in interface configura-
tion mode:
service-module t1 lbo {-15 db | -7.5 db}
This command decreases the outgoing signal strength in decibels.