Using HDLC.FRAME Protocol
Status and Error Messages
| E1/T1 interface |
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| The following unsolicited status codes may be received by an application | |
| program from the HDLC.FRAME protocol on an E1/T1 interface. | |
Table | E1/T1 Interface Unsolicited Status Codes | |
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| Unsolicited | Description |
| Status Code |
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| IO_OK | No error detected. |
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| Normal communications have been established or |
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| resumed. |
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| IO_DSBL | Terminal Disabled |
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| IO_TX_TMOUT | Cable or local modem fault. |
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| The physical connection to the remote device has been |
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| lost. |
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| IO_LONG_MSG | Frame too long (SS7 only) |
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| HDLC.FRAME has entered octet counting mode. |
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| IO_RX_BUF | No receive buffers |
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| The number of available free buffers or message headers |
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| on the interface card is dangerously low. |
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| IO_ALRDY_ENBL | Terminal already enabled |
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| An enable request was received for an HDLC.FRAME |
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| terminal which was already enabled. |
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| IO_ALRDY_DSBL | Terminal already disabled |
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| A disable request was received for an HDLC.FRAME |
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| terminal which was already disabled. |
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| IO_STATS | This message is sent in response to a CW_STATS control |
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| write. The data buffer contains an l2stat_type |
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| structure (defined in fw_types.h). The l2stat_type |
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| structure is the same as the x25l2stat_type structure |
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| mentioned above, except that it has some additional |
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| fields. |
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30 | Chapter 3 |