7. Appendix B: Reliability
THE VIDYO INFORMATION OR THIRD PARTY VENDOR DATA CONTAINED HEREIN IS PROVIDED STRICTLY "AS IS", WITHOUT WARRANTY, AND VIDYO EXPRESSLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, TITLE OR FITNESS FOR A PARTICULAR PURPOSE REGARDING SAID INFORMATION OR DATA, EVEN IN THE EVENT VIDYO HAS KNOWLEDGE OF DEFICIENCIES IN SAID INFORMATION OR DATA. VIDYO DOES NOT ENSURE OR GUARANTEE THE ACCURACY OF ANY SUCH VIDYO INFORMATION OR THIRD PARTY VENDOR DATA AND SUCH INFORMATION AND/OR DATA IS UTILIZED BY RECIPIENT SOLELY AT ITS OWN RISK AND EXPENSE. VIDYO DISCLAIMS LIABILITY FOR ANY AND ALL CLAIMS, DAMAGES , COSTS OR EXPENSES, INCLUDING SPECIFICALLY BUT WITHOUT LIMITATION, LOST PROFITS, LOST DATA OR LOST BUSINESS EXPECTANCY, COMPENSATORY, INCIDENTAL AND OTHER CONSEQUENTIAL DAMAGES, ARISING OUT OF OR IN ANY WAY RELATING TO RECIPIENT’S RECEIPT, USE OF, RELIANCE OR ALLEGED RELIANCE UPON THE INFORMATION OR DATA, OR VIDYO'S ACTS OR OMISSIONS REGARDING SUCH INFORMATION OR DATA, EVEN IF RECIPIENT INFORMS VIDYO, WHETHER EXPRESSLY OR BY IMPLICATION, OF ITS RECEIPT, USE OR RELIANCE UPON SUCH INFORMATION, AND EVEN IF SUCH LOSSES ARE DUE OR ALLEGED TO BE DUE IN WHOLE OR IN PART TO VIDYO'S NEGLIGENCE, CONCURRENT NEGLIGENCE OR OTHER FAULT, BREACH OF CONTRACT OR WARRANTY, VIOLATION OF DECEPTIVE TRADE PRACTICES LAWS OR STRICT LIABILITY WITHOUT REGARD TO FAULT. RECEIPT OF THE INFORMATION HEREIN IS DEEMED ACCEPTANCE OF THE TERMS HEREOF.
Limitations of reliability prediction models
- Reliability prediction models provide MTBF point estimates. Model inputs include base component failure rates, environmental, quality, and stress factors.
- Base failure rates use failure data from multiple sources, including industry field data, research lab test results, and government labs.
- Environmental, quality and stress factors may differ from field conditions.
- Predictions assume a constant failure rate which does not account for failures due to early life quality issues or wearout phenomena.
General prediction methodology
- VIDYO’s default prediction methodology is Telcordia SR332, Reliability Prediction.
Electronic equipment procedure
- Other methods may be used to estimate the reliability of certain products and/or subsystems.
- System reliability predictions consider the impact of redundant components.
Component parameters and assumptions
- The default methodology for MTBF predictions is Telcordia method 1, case 3.
- Assumptions include 25˚ C system inlet air temperature, quality level II components, ground- based, fixed, controlled environment, and 100% duty cycle. Components internal to the system are generally assumed to be operating at 40˚ C ambient and 50% electrical stress.
Supplier MTBF data
- In developing system MTBF predictions, VIDYO uses MTBF data provided by suppliers.
- Apart from using industry standard prediction methodologies, suppliers may derive MTBF data from reliability demonstration testing, life testing, actual field failure rate, or specification and datasheets.
- Supplier data is provided as is to VIDYO, and VIDYO generally does not verify the accuracy of Supplier data.
Subsystem MTBF data release policy
VIDYO does not release MTBF data below the system level.
The reasons for this policy are:
- VIDYO considers internally designed subsystem MTBF data to be confidential intellectual property.
- VIDYO obtains supplier subsystem MTBF data under NDA and is prohibited from sharing such data outside of VIDYO.
MTBF reliability
The MTBF prediction is calculated using component and subassembly random failure rates. The calculation is based on the Telcordia SR-332 Issue 2, Method I, Case 3.
| Product | Part number | MTBF |
| HD-2 | PKG-RM-HD2-GROUP, DEV-RM-HD2-SA | 61,115 hours |
| HD-3 | PKG-RM-HD3-NTPM-GROUP, PKG-RM-HD3-GROUP, DEV-RM-HD3-SA, DEV-RM-HD3-NTPM-SA | 179,500 hours |
| HD-40B | DEV-RM-HD40-B-SA-0A | 66,640 hours |
| HD-40C | DEV-RM-HD40-C-SA-0A | 61,825 hours |
| HD-100D | DEV-RM-HD100-D9020-SA-0A & DEV-RM-HD100-D- NTPM-SA-0A | 75,400 hours |
| HD-230 | DEV-RM-HD230-NTPM-SA-0A & DEV-RM-HD230-SA-0A | 80,520 hours |
| VidyoGateway | DEV-SRV-GW-N2-0B | 29,900 hours |
| VidyoGateway XL | DEV-SRV-GW-XL-N3-0A | 121,400 hours |
| VidyoOne | DEV-SRV-ONE-N2-0B | 29,900 hours |
| VidyoPortal | DEV-SRV-PT-N2-0B | 29,900 hours |
| VidyoPortal XL | DEV-SRV-PT-XL-N3-0A | 116,700 hours |
| VidyoReplay | DEV-SRV-REP-N3-0A | 116,700 hours |
| VidyoRouter | DEV-SRV-RTR-N2-0B | 29,900 hours |
| VidyoRouter XL | DEV-SRV-RTR-XL-N3-0A | 103,600 hours |
Supplier real-time clock data
- In developing system Real-Time Clock predictions, VIDYO uses data provided by suppliers.
- Apart from using industry standard prediction methodologies, suppliers may derive Real-Time Clock data from reliability demonstration testing, life testing, actual field failure rate, or specification and datasheets.
- Supplier data is provided as is to VIDYO, and VIDYO generally does not verify the accuracy of Supplier data.
Real-time clock data
The information below applies to HD-40A, HD-40B, HD-40C, and HD-100 products.
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the kit is not plugged into a wall socket, the battery has an estimated life of three years. When the kit is plugged in, the standby current from the power supply extends the life of the battery. The clock is accurate to 13 minutes/year at 25 ˚C with 3.3 VSB applied via the power supply 5 V STBY rail.
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Note If the battery and AC power fail, date and time values will be reset and the user will be notified during POST. When the voltage drops below a certain level, the BIOS Setup program settings stored in CMOS RAM (for example, the date and time) might not be accurate. |
