dClocking: Network (default)
Options: Network, Internal, External
Network: This is the most commonly used setting when connect ing to a carrier’s network. In this mode, the unit recovers the clock from the received signal and uses it to transmit data. In this way the unit remains synchronized to a master clock. In campus applications, one of the units must be set to Internal clock, and the other end is set to Network clock. At all times, there must be only one clock source. Otherwise, clock slips and framing errors and bit errors may occur.
Internal: This is commonly used in campus applications, where the unit is not connected to the public telephone network directly. In this mode, the unit uses the
External: This is a special mode that should only be used with the Unframed format. In this mode, the unit requires a 1.544 Mhz clock signal from the DTE via the external clock pin on the DTE interface connector. Most applications will use Network or Internal clock modes.
eLine Build Out (dB): 0 – 133 feet, 0 dB (default)
Options: 0 – 133 feet, 0 dB 133 – 266 feet 266 – 399 feet 399 – 533 feet 533 - 655 feet
-15.0 dB -22.5 dB
This controls the transmitter signal strength and pulse shape. For most applications, the default setting will suffice. When connecting to a carrier connection, the carrier will determine what LBO is necessary. 0 dB provides the highest signal strength and therefore the longest dis- tance, while
fESF Data Link: ANSI T1.403
Options: ANSI T1.403, AT&T TR54016
ANSI T1.403: This ANSI developed standard (see ANSI T1.403- 1995:
AT&T TR54016: Developed by AT&T, this FDL method differs principally from the ANSI method in two ways: First, the ANSI method transmits messages continuously, whereas the AT&T method transmits a performance report only upon a request from the remote end for a report. Second, the AT&T method provides a historical summary, up to the last 24 hours, of NI performance. Only the service provider or special test equip- ment can send these requests. When AT&T TR54016 is selected, ANSI PRMs are still transmitted by the unit, but only PRMs sent by the carrier will be recognized. To receive PRMs from another customer unit (i.e., in a campus application), select ANSI T1.403. When the frame is not ESF, the FDL is disabled.
gESF Carrier Loops: Enabled (default)
Options: Enabled, Disabled
The ESF format provides the CO the ability to put the customer installation’s
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