Verilink FrameStart FSD (34-00291.F) Product Manual - Manual (Page 40)

34 D D S C S U / D S U a n d T 1 C S U / D S U a n d F r a m e S t a r t F S E
Line Code
Sets the network interface line coding as AMI or B8ZS.
Clock Source
Sets the timing source to synchronize the unit’s internal timing generators.
Slips are controlled to occur on frame boundaries at the network port when
timing synchronization is lost. Network timing is derived from the network
recovered clock (most applications use this selection). Internal uses the unit’s
internal frequency as the standard for all timing.
Sensitivity
Sets the unit’s receiver sensitivity. When enabled, the unit can respond to
signals attenuated to 36 decibels. When disabled, the unit can only respond
down to 30 decibels of attenuation.
LBO
Shows the line build out signal attenuation for the network interface as 0,
−
7.5,
−
15, or
−
22.5 decibels.
Yellow Alarm
Enables or disables the unit’s ability to transmit a yellow alarm.
Density
Enables or disables density enforcement. This does not apply if the line code
is set to B8ZS.
FDL
Selects the type of operation for the facilities data link. The choices are
NONE, ANSI, and AT&T. This only applies when the Framing is set to ESF.
Channels Assigned
Selects whether the channel assignment are made as a CONT (contiguous)
group or as ALT (alternate) channels. Alternate channel mode assigns an idle
channel following each data channel. For example, data is carried on channels
1, 3, 5, and 7. Channels 2, 4, 6, and 8 are idle (the idle setting is binary code
01111111). The advantage of alternate channel assignment is that T1 ones
density requirements are maintained by the idle channels rather than placing
any restrictions on the high-speed data but reduces the available bandwidth
from 1.536 kbps to 768 kbps.