| Index |
| Unique index of the X21 interface. |
| L1State |
| The X21 physical layer state dn(1) physical layer is inactive; up(2) physical layer is active; Enumerations: |
| L1Mode |
| The physical layer (layer 1) mode. When configured as DCE(2) the X21 interface provides the clock. Enumerations: |
| IfLeads |
| The value of IfLeads has influence on the state of the physical layer (L1State). When configured as IfLeads=enabled(1), the state of the physical layer depends on the signals of the X.21 interface pins `Indication' and `Control'. When configured as IfLeads=disabled(2), the state of the physical layer stays always up. Enumerations: |
| Speed |
| The X21 interface speed in bits per second. The range can be configured between 2Mbits and 2400 Bits per second. Enumerations: - s2048k (1)
- s1024k (2)
- s512k (3)
- s256k (4)
- s128k (5)
- s64000 (6)
- s38400 (7)
- s19200 (8)
- s14400 (9)
- s9600 (10)
- s2400 (11)
|
| L2Mode |
| The layer 2 mode. This value has influence on the HDLC address field (first byte of a HDCL frame). When configured as DTE(1) the address in a command frame is 0x01, when configured as DCE(2) it is 0x03. For response frames it is vice versa. When configured as AUTO(3), layer 2 is set to the same mode like L1Mode is set. Enumerations: |
| SpeedReal |
| The measured X21 interface speed in bits per second. |
| RxPackets |
| Count of received valid Frames. |
| RxOctets |
| Count of received bytes. |
| TxPackets |
| Count of transmitted valid Frames. |
| TxOctets |
| Count of transmitted bytes. |
| RxResets |
| Count of receiver resets. Under rare circumstances it might be necessary to reset the receiver to work properly. |
| RxAborts |
| Count of receiver aborts. The sender of a frame can indicate a frame as aborted with a special Abort sequence. |
| RxOverruns |
| Count of receiver overruns. If the X21 card is unable to grant sufficiently soon/often the bus, the 32-character RxFIFO may fill up. This leads to loss of data. |
| RxCRCErrors |
| Count of corrupted frames. Errors due to interference on the X21 cable. |
| RxGiantFrames |
| Count of received frames with illegal framesize. This can occur if a frame delimiter is destroyed. |
| TxResets |
| Count of transmitter resets. Under rare circumstances it might be necessary to reset the transmitter to work properly. |
| TxAborts |
| Count of transmitter aborts. While sending a frame it might be necessary to indicate this frame as aborted. In this case the receiver regards this frame as illegal. |
| TxUnderruns |
| Count of transmitter underruns. The serial data for the X21 card is supplied too slowly. |
| TxGiantFrames |
| Count of transmitted frames with illegal framesize. This can occur if an upper module creates packets with more than the maximum allowed packet size. |
| IfReSyncs |
| Count of interface resynchronization. Under rare circumstances it might be necessary to resynchronize the physical interface to work properly. |
| Bundle |
| Index of the bundle to aggregate multiple Channels to one interface. Range: 0 to 255 |