F i n i s a r |
1Enhanced Options
2“Enhanced Options” is a 1 byte field with 8 single bit indicators which describe the
3optional digital diagnostic features implemented in the transceiver. Since transceivers
4will not necessarily implement all optional features described in this document, the
5“Enhanced Options” bit field allows the host system to determine which functions are
6 available over the 2 wire serial bus. A ‘1’ indicates that the particular function is
7implemented in the transceiver. Bits 3 and 6 of byte 110 (see Table 3.17) allow the
8user to control the Rate_Select and TX_Disable functions. If these functions are not
9implemented, the bits remain readable and writable, but the transceiver ignores them.
10 | Finisar transceivers | with | alarm | and | warning flags enabled contain the value | ||||
11 | 0b10010000 at location 93. |
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| Table 3.9: Enhanced Options | ||||
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| Data Address |
| Bits |
| Description |
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| 93 |
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| 7 |
| Optional Alarm/warning flags implemented for |
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| all monitored quantities (see Table 3.18) |
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| 93 |
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| 6 |
| Optional Soft TX_DISABLE control and |
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| monitoring implemented |
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| 93 |
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| 5 |
| Optional Soft TX_FAULT monitoring |
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| implemented |
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| 93 |
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| 4 |
| Optional Soft RX_LOS monitoring |
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| implemented |
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| 93 |
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| 3 |
| Optional Soft RATE_SELECT control and |
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| monitoring implemented |
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| 93 |
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| Reserved |
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13 |
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14 |
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15 |
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16 | Note that the “soft” | control functions - | TX_DISABLE, TX_FAULT, RX_LOS, and | ||||||
17RATE_SELECT do not meet the timing requirements specified in the SFP MSA section
18B3 “Timing Requirements of Control and Status I/O” and the GBIC Specification,
19revision 5.5,
20 | allow a host to poll or set these values over the serial bus as an alternative to | |
21 | monitoring/setting pin values. | Timing is vendor specific, but must meet the |
22requirements specified in Table 3.10 below.
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9/26/02 Revision D | Page 15 |
