EXFO FTB-8510B Guia Del Usuario página 793

Alarm Analysis
Possible alarms that can be detected are:
LOS (Loss Of Signal): The LOS alarm indicates absence of an input
signal or an all-zeros pattern was detected.
Frequency: The frequency alarm indicates if the received signal rate
meets the standard rate specifications (green) or not (red).
DS1
E1
E2
E3
DS3
STS-1e/STM-0e
E4
STS-3e/STM-1e
SONET/SDH Application
Interface
1544000 ±57 bps (±36.6 ppm)
2048000 ±112 bps (±54.6 ppm)
8448000 ±293 bps (±34.6 ppm)
34368000 ±846 bps (±24.6 ppm)
44736000 ±1101 bps (±24.6 ppm)
51840000 ±1276 bps (±24.6 ppm)
139264000 ±2730 bps (±19.6 ppm)
155520000 ±3826 bps (±24.6 ppm)
Port RX (Electrical Interfaces)
Standard Rate Specification
Port Tabs
143