MTBF (Mean Time Before Failure) Data
Reliability data for the Sonus SBC 1000 and SBC 2000 is provided below. Reliability data such as MTBF are non-binding estimates of product performance and is based on use of the products in compliance with related product data sheets, including, without limitation, within the specified electrical, thermal and mechanical parameters. An MTBF measurement is based on a statistical sample and is not intended to predict any one specific unit’s reliability; thus MTBF is not, and should not be construed as, a warranty measurement. Please consult your Sonus sales contact should you have any questions or would like additional information.
Predicted MTBF values were calculated according to Telcordia Technologies Special Report SR-332, Issue 1, May 2001 using Method II, (Black Box stress method integrated with laboratory data) including noted items below.
- Integrated circuits and ferrite inductors use vendor provided laboratory data.
- Purchased assemblies use reliability data provided by the OEM.
- Environmental factor = Ground Benign
- Quality Level 2 used for all components
- Maximum operating temperature = 40°C
MTBF value for chassis fans relate to the failure rate of the fans during their useful life, which is 70,000 hours per fan.
Observed MTBF values are derived from actual field reliability measurements of SBC 1000 chassis, cards and other sub-assemblies as of November 2016. These values are subject to change as Sonus updates actual field reliability measurements on a periodic basis.
MTBF (Mean Time Before Failure) Considerations
This data is provided "as is" without any express or implied warranty of any kind including warranties of merchantability or fitness for any particular purpose. In no event shall Sonus Networks or its suppliers be liable for any damages whatsoever (including, without limitation, damages for loss of profits, business interruption, loss of information) arising out of the use of, or inability to use, the data even if Sonus Networks has been advised of the possibility of such damages.
Values on this page apply to pre-6.1 hardware. Sonus will post 6.1 values in the near future, please contact your Sonus representative if you have any questions.
Base Predicted and Observed MTBF Values for Constituent SBC Edge Products
The tables below list the MTBF values for constituent (i.e. minimally configured base systems and optional daughter cards) used in the SBC 1000 and SBC 2000. Fully assembled, customer orderable system-level SBC Edge product MTBF values can be determined from the equation documented in the next section.
SBC 1000 Constituent MTBF Values
| SKU* | Description | Predicted MTBF in Years | Observed** MTBF in Years |
|---|---|---|---|
| SBC-1K-SIP-E | Base System: Base Board, Fans & Power Supply | 3.1 | 46.8 |
| SBC-1K-CRD-DSP-M | SBC C300 based DSP Card | 239 | 140 |
| SBC-1K-CRD-2T1E1 | SBC 1K Dual Port DS1 card | 175 | 421 |
| SBC-1K-CRD-4FXSL | SBC 1K 4 port FXS Lower Card | 161 | 240 |
| SBC-1K-CRD-4FXSU | SBC 1K 4 port FXS Upper Card | 403 | 1683 |
| SBC-1K-CRD-4FXOU | SBC 1K 4 port FXO Upper Card | 194 | 240 |
| SBC-1K-CRD-4BRI | SBC 1K 4 port BRI Card | 162 | 842 |
| SBC-1K-BRD-AME | Applications Solutions Module (AME unit), 4GB ECC MEMORY | 75 | 153 |
*Availability of SKUs subject to applicable end-of-product sale notices. Please refer to sonus.net.
**Observed MTBF values derived from actual field reliability measurements of SBC 1000 base chassis equivalent to the SBC-1K-SIP-E, cards and other sub-assemblies (as opposed to customer-orderable, system-level SBC Edge product SKU) as of November 2016. MTBF data subject to change over time as additional measurements are received. Please contact your Sonus sales representative for more information.
SBC 2000 Constituent MTBF Values
| SBC SKU* | Description | Predicted MTBF in Years | Observed** MTBF in Years |
|---|---|---|---|
| SBC-2K-1 | Base System: Main Board, eUSB, Fans, Mid Plane, Single power supply | 2.0 | 18.4 |
| SBC-2K-CRD-DSP-H | SBC C900 DSP module | 196 | 188 |
| SBC-2K-CRD-T1E1 | SBC Telco Module, 8 T1/E1 ports | 122 | 845 |
| SBC-2K-CRD-24FXS | SBC Telco Module, 24 FXS ports | 37 | 211 |
| SBC-2K-BRD-SBA | SBC Application Solutions Module (SBA) | 79 | 80 |
| SBC-2K-PSU-AC | AC Power Supply Module | 11 | 20 |
*Availability of SKUs subject to applicable end-of-product sale notices. Please refer to sonus.net.
**Observed MTBF values derived from actual field reliability measurements of SBC 2000 base chassis, cards and other sub-assemblies (as opposed to customer-orderable, system-level SBC Edge product SKU) as of November 2016. MTBF data subject to change over time as additional measurements are received. Please contact your Sonus sales representative for more information.
Predicted and Observed MTBF Values for Customer-Orderable, System-Level SBC Edge Product
Method to Calculate Predicted and Observed MTBF Values
The following equation can be used to calculate the predicted and likely observed MTBF values for a given SBC 1000 or SBC 2000 complete, fully assembled system. A complete list of such systems is available behind the Sonus Partner Portal.
Predicted or Observed MTBF of complete SBC Edge System = 1/ ((1/MTBF of Base System) + (1/MTBF of first desired constituent accessory) + (1/MTBF of second desired constituent accessory) ...)
When using the equation, Sonus customers must use only observed or predicted constituent values from tables 1 or 2 to determine the system-level SBC Edge product. By way of example:
- When seeking the predicted MTBF of an SBC 1000 complete, fully assembled system, only use the appropriate values from the Predicted MTBF in Years column of Table 1
- When seeking the observed MTBF of an SBC 2000 complete, fully assembled system, only use the appropriate values from the Observed MTBF in Years column of Table 2
Examples of Calculated, Predicted, and Observed MTBF Values
The tables below shows examples of a Sonus customer using the aforementioned equation to calculate the predicted and observed MTBF for example fully assembled, system-level SBC Edge products.
SBC 1000 System-Level MTBF Examples
| SBC SKU* | Description | Predicted MTBF in Years | Observed MTBF in Years |
|---|---|---|---|
| SBC-1K-4FXS | Base system + FXS lower card | 3.1 | 39.2 |
| SBC-1K-FXSFXO-S | Base system + C300 DSP card + 2x FXS Lower Card + FXS Upper Card + FXO Upper Card + AME unit | 2.8 | 20.8 |
*Availability of SKUs subject to applicable end-of-product sale notices. Please refer to sonus.net.
SBC 2000 System Level MTBF Examples
| SBC SKU* | Description | Predicted MTBF in Years | Observed MTBF in Years |
|---|---|---|---|
| SBC-2K-S-1 | Base system + SBA | 2.0 | 15.0 |
SBC-2K-6 | Base system + 5x C900 DSP | 1.9 | 12.3 |
*Availability of SKUs subject to applicable end-of-product sale notices. Please refer to sonus.net.
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