SSG 20 Hardware Installation and Configuration Guide
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Table 3: Field Description for T1 Physical Layer Tab
Field Description
Clocking Sets the transmit clock on the interface.
Line Buildout Sets the distance at which an interface drives a line. Default
setting is 0~132 feet.
Line Encoding Sets the line encoding format on the interface.
Auto Mark Inversion
8-bits zero suppression
Bye Encoding Sets the byte encoding on the T1 interface to use 7-bits per
byte or 8-bits per byte. Default is 8-bits.
Frame Checksum Sets the size of checksum. Default is 16.
Framing Mode Sets the framing format. Default is extended mode.
Idle Cycles Flag Sets the value that the interface transmits during idle cycles.
Default setting is 0x7E.
0x7E (flags)
0xFF (ones)
Start/End Flags Sets the transmission of start and end flags to either filler or
shared. The default is filler.
Invert data checkbox Enables inverted transmission of unused data bits.
Loopback Respond checkbox Enables loopback between the T1 interface and the remote
channel service unit (CSU).
Time Slots Sets the use of time slots on a T1 interface. Default is 0, all 24
time slots used.
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