Verilink Access Manager 2000 (896-502037-001) Product Manual - Manual (Page 210)

Configuring the T1 Network
5-86 Access Manager 2000 User Manual
7.5 dB The first repeater is 1000 to 2000 feet away.
15 dB The first repeater is less than 1000 feet away.
0 dB The network does not use line repeaters.
This option lets you select the type of minimum-ONEs density
enforcement on the network. If the CSU uses AMI line coding, choose
one of the following settings:
12%+80Z When you choose this mode, the CSU stuffs a ONE into
every string of eight (8) consecutive ZEROs whenever
either the average density is below 12.5 percent or there
are more than 80 consecutive ZEROs. This is the default
setting.
AT&T TR-62411 When you choose this mode, the CSU
stuffs a ONE into every string of more than 15
consecutive ZEROs or whenever there is not a minimum
of N ONEs in every window of 8(N + 1) consecutive
pulses, where N has a value from 1 to 23.
1 in 80 Stuffs a ONE into every string of more than 80
consecutive ZEROs.
1 in 15 Stuffs a ONE into every string of more than 15
consecutive ZEROs.
NONE Pulse density enforcement is not used. Use this mode for AMI
unrestricted ZEROs operation. Also, select NONE if
B8ZS coding is used.
This option lets you choose which type of signal the CSU applies to the
network as a keep-alive. The options are:
FAIS framed alarm indication signal, all-ONEs
AIS unframed AIS
NONE pass signal to NET
LPBK looped network signal through a line loopback [LLB].
The default setting is for unframed AIS .
NET Density
Enforcement
NET Keep-Alive