ADTRAN Cable T1 ESF CSU ACE - Manual (Page 32)

Chapter 4. Operation
32 T1 ESF CSU Rackmount User Manual 61202066L1-1B
Network Options
Format (network)
This option selects the framing format for the network interface.
Superframe format (SF) and extended superframe format (ESF) are the
two choices. ESF provides an out-of-band communications channel when
used on the network side that allows the carrier or remote user to retrieve
performance monitoring data and initiate loopbacks in accordance with
ANSI TIA03 and AT&T 54016. When connected to a public network, the
framing format must be compatible with the carrier-provided service. The
DTE interface framing format must match that of the DTE. The network
and equipment interfaces may use different framing formats from each
other with the Tl ESF CSU RM performing translation between formats.
Line Code (network)
This option selects whether the Tl ESF CSU RM uses straight AMI line
coding or B8ZS. B8ZS ensures 1s density requirements on the network
by replacing an all 0s byte with a specific byte containing two intentional
bipolar violations. When connected to a public network, the framing
format must be compatible with the carrier-provided service. The T1 ESF
CSU RM can convert AMI to B8ZS so that older equipment can use
B8ZS
lines.
Yellow Alarm
This option enables or disables the transmission of yellow alarms by the Tl
ESF CSU RM. When the Tl ESF CSU RM is in red alarm (caused by LOS
/ OOF conditions) a pattern may be sent towards the network to alert the
carrier / far end of the red alarm. In D4/SF format, the yellow alarm is sent
in-band and thus corrupts the data in the outgoing direction. Some private
network applications may require the yellow alarm transmission be
disabled. If using a carrier-provided Tl, enable the
YELLOW ALARM
.