The E1/T1 Trunk Status page provides information on the selected trunk state. The following information
is displayed on this page:
E1/T1 mode - displays which mode has been selected: E1 or T1.
Interface Type - displays the selected interface type: User or Network.
Signaling Type - displays the selected signaling type: CAS or CCS.
Clock Mode - displays the selected clock mode: Master or Slave.
Framing mode - displays the selected framing mode.
Line Code - displays the E1/T1 line code.
Link - displays the E1/T1 link state: up or down.
Frame Synchronization - displays the signal synchronization state in the trunk: Yes or No.
Red Alarm - indicates that the receive frame alignment for the line has been lost and the data
cannot be extracted properly. The red alarm is initiated by the loss of frame condition for the various framing
formats.
Out of Frame - number of Out of Frame errors.
Line Code Violation - number of Line Code Violation errors.
Frame Synchronization - number of Frame Synchronization errors.
Link Synchronization - number of Link Synchronization errors.
The following statistics is available if CAS Signaling has been selected:
Active Calls - currently active calls on the selected trunk.
Outgoing Calls - total outgoing calls on the selected trunk.
Incoming Calls - total incoming calls on the selected trunk.
The following statistics is available if CCS Signaling has been selected:
ISDN PRI Layer statistics:
Received Packets - number of received packets.
Received Errors - number of received defective packets.
Transmitted Packets - number of transmitted packets.
Transmitted Errors - number of transmitted defective packets.
The ISDN PRI Layer 2 statistics is displayed for actual TEI value and the received and transmitted packets:
TEI Value - the actual TEI assigned.
L2 State - the state of the TEI assignment.
Information Frame - signaling packets for call initiation and termination.
Receive Ready - control packets when the E1/T1 link is up.
Receive Not Ready - control packets when inable to accept calls by destination.
SABME - packets during connection establishment.
Disconnected Mode - packets when connection is being terminated.
Disconnect - packets during connection termination.
Unnumbered Acknowledgement - packets during accepting connection establishment/termination.
Framer - packets as a report of an error condition.
TEI - packets containing TEI(Terminal Endpoint Identifier) to initiate subscription of the device at the network.
Unnumbered Information Frame - broadcast signaling packets received for call initiation and termination.
Exchange Identification - received packets containing connection management settings.
ISDN PRI Layer 2 Errors statistics:
Incorrect Length - packets with incorrect length.
Bad Supervisory Frame - packets with incorrect supervisory header.
Bad Unnumbered Information Frame - packets with incorrect unnumbered information frame header.
Bad Frame Type - packets with bad frame type.
Bad Unnumbered Frame - packets with incorrect unnumbered acknowledgement frame header.
Bad TEI Value - packets with bad TEI (Terminal Endpoint Identifier) value.
ISDN PRI Layer 3 statistics shows the same information as for CAS signaling.
No E1/T1 trunk statistics is displayed in this page at first, but the page will be refreshed automatically
every 10 minutes. Statistics collected since that time and the last resetting of the counter will be displayed here.
The Blocked Timeslots text field lists the timeslots blocked by the carrier. The field is present for E1/T1 CAS R2 signaling type only.
Current System Time displays the actual time on the Quadro and the Last Time Cleared displays the exact date and time when the E1/T1 Stats has been manually cleared last time. System Uptime displays the period Quadro is on since last reboot. To reset the statistics counters press the Clear button.