User Manual

INSTALLATION AND MAINTENANCE MANUAL
LYNX.sc E1 FAMILY
SPREAD SPECTRUM RADIOS
OCTOBER 1998
SECTION 3: INSTALLATION & ADJUSTMENTS PAGE 3-29
3.12.4 Input Alarm (Data Loss) Enable/Disable
The LYNX.sc radio provides a capability to enable or disable input alarms (Data Loss). On the
front panel and over the alarm and diagnostic interfaces, an alarm condition is normally generated
if there is no input data signal (E1) to the radio. For example, in the case of the double E1
capacity model, the radio may have been installed in a location only requiring one E1 signal for
traffic while the second E1 channel has been left idle (for future planned expansion). In this case,
it may be desirable to disable the input alarm to the second channel so that local and remote
alarms are not regularly generated by the (known) lack of this data input. When the network is
later expanded to include traffic on the second E1, this switch can be set to enable the input data
alarm condition. See Figure 3-14 for DIP switch segment settings for the 4xE1 model. Refer to
appendix B for all models.
When a DATA LOSS alarm condition occurs, the LYNX.sc
radio will inject AIS into the incoming data stream, even if the
input alarm has been disabled.
1xE1 and 2xE1 Models:
On SW1, switch segment(s) 1 (and 2) apply to channels 1 and 2 respectively.
4xE1 Model:
On SW3, switch segment 3 applies to Channel 3 input while switch segment 4 applies to Channel
4 input.
Figure 3-14: Input Alarm Disable Switch