Symptoms of PRI trouble may include poor sound quality or dropped calls. Information for each port can be found on the Troubleshooting Information page for each port, accessible from the port detail screen.
The following information is available on the Troubleshooting Information screen:
- Total rx packets: Total received Packets
- Total tx packets: Total Sent Packets
- Total rx bytes: Total Received Bytes
- Total tx bytes: Total Sent Bytes
- Bad rx packets: Bad Received Packets
- Packet tx problems: Failed Packet Transmit Attempts
- Rx frames dropped: Received Frames Dropped
- Tx frames dropped: Sent Frames Dropped
- Multicast rx packets: Multicast Packets Received
- Tx collisions: Collisions in Sent Packets
- Rx length errors: Received Packets of Incorrect Length
- Rx overrun errors: The rate with which data is coming to your server exceeds the limit that the server's NIC can handle
- CRC errors: Packet Checksum Errors
- Abort frames: Token Ring Abort Frames
- Rx fifo overrun: see Rx overrun errors (It is not uncommon to see these when the card is starting up. Once all ports are up and working, you should not see them any longer.)
- Rx missed packet: A variation in the delay of received packets
ALOS (Loss of Signal): Analog Loss of Signal
Cabling issue. Check the health of the cable plugged into the port, as well as its connection to the port it is plugged into. You will also see the Rx Level either very low, or in a disconnected state: -36 -> -44. It is typical to have this alarm triggers in combination with 'Open Circuit' if there is an issue with the physical connection
LOS (Loss of Signal): Digital Loss of Signal
LOF (Loss of Framing):
Raised after four consecutive frames with FAS error. If RAI and AIS alarms are not indicated, verify that you have selected the proper line framing (i.e T1: ESF, D4, E1:CRC4, NCRC4..etc)
Red (Local Alarm):
Usually indicates a physical problem on the local side such as a cable being disconnected
AIS/Blue (Intermediate Alarm): Alarm Indication Signal
Typically know as a BLUE Alarm. all-ones signal transmission to the receiving equipment (the Sangoma card) to indicate that an upstream repeater (telco equipment) is in alarm, due to upstream transmission fault, either from another repeater or from the telco itself. If the only alarms indicating in the wanpipemon output is AIS:ON, then contact your telco with this information (RAI:ON can also be a possibility in this case as well)
RAI (Remote Alarm):
Indicates that the Far end (typically the Telco) is in RED alarm state and sending that message over the line. If the only alarm in your wanpipemon output is RAI:ON then contact your telco with this information.
You will also get this alarm, and only this alarm, if your framing is incorrect.
Line Code Violation: This occurs upon a bipolar violation
Bit Errors: The number of bit errors is the number of received bits of a data stream over a communication channel that have been altered due to noise, interference, distortion or bit synchronization errors
Out of Frame Errors: An OOF defect is the occurrence of a particular density of Framing Error events.