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5.2 CENTRAL OFFICE LOOPS
The 2090 also responds to central office initiated loop commands.
When in D4 framing mode, the 2090 will implement the "loop up" com-
mand when it recognizes the pattern "10000" in the data stream for a
minimum of 5 seconds. The "loop down" command is implemented by
the pattern "100" in the data stream for a minimum of 5 seconds.
When operating in ESF framing mode, loopback commands are
issued via the Facility Data Link (FDL). The line loop message will
cause a loop back before data enters the framer portion of the convert-
er. The payload loop message will cause the 2090 to loop data after
the framer portion of the converter.
The 2090 will respond to Universal Loopback Deactivate to clear
all central office loops.
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APPENDIX A
PATTON MODEL 2090 SERIES SPECIFICATIONS
WAN Speed:
1.544 Mbps
WAN Connection:
RJ-48C
Nominal Impedance:
100 Ohms
DTE Interface:
Integral V.35, M/34 male
Line Coding:
AMI/B8ZS
Line Framing
D4/ESF
Receive LBO:
Automatic
Transmit LBO:
Selectable - 0, 7.5,
15, or 22.5 dB
Clock Options:
Internal, external and network clock
Diagnostics:
Responds to CO initiated D4 loopup
and loopdown codes, ESF line loop
and payload loop FDL messages,
Universal Loopback De-activate mes-
sage.
Standards:
AT&T TR62411, ANSI T1.403, TR54016
Power Supply:
120VAC, 60 Hz to +5VDC 300mA wall-
mount transformer or Universal Input
100-240VAC, 50-60Hz, +5 VDC, 3A
wall-mount transformer
Dimensions:
3.5"L x 2.1"W x 0.78"H (9.0 x 5.3 x 1.9
cm)
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