Black Box MWU2000-G703 T1 Parameters Menu Items and Actions, Pulse Shape, T1 Alarm Buffer

2.048Mbps Wireless Modem

Remote-BreezeLINK-UnsyncIndicates a temporary incidence of a very noisy radio channel. Repeated occurrences indicate either a very noisy radio channel or a hardware problem (e.g. clocks with excessive jitter) or a problem related to configuration of clocks. Too many BPV/CV Too many Bipolar code violations, indicates selection of Bipolar AMI line code in the modem when the end equipment uses HDB3 line code.

When an alarm is detected a note appears at the bottom of the display: (Note:An alarm has been activated), and the message ALARM EXISTS is displayed on the menu header (see Figure 3-1). In addition, the TEST LED blinks.

T1 Parameters Menu

Table 3-3. T1 Parameters Menu Items and Actions

Pulse Shape

The current selection is displayed (the “NOT DEFINED” message is displayed if LIU used is not T1). The selection should be made according to the length of the line connecting the terminal equipment to the 2.048Mbps Wireless Modem, and according to the type of application (CSU or DSU network interface). The selection affects the pulse mask used in the interface according to the requirement specified in the applicable standard (DSX-1 for DSU network interface, ANSI T1.403 for CSU network interface). See Appendix B for more details about CSU and DSU network interfaces.

T1 Alarm Buffer

The possible alarms are:

•LOS (all zeros signal): Loss Of Signal – No signal is received from the data equipment.

•AIS: Alarm Indication Signal – Signal is not received by the data equipment.

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