MTBF 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. Please consult your Sonus sales contact should you have any questions or would like additional information.
This report is also available in PDF format. (November 26, 2014)
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.
The tables below show the MTBF for each of the items used in the SBC 1000 and SBC 2000, as well as system MTBFs for several example configurations.
SBC 1000
SBC 1000 Components / Accessories
| SBC Component | Description | MTBF in Years |
|---|---|---|
| SBC-1K-CHASSIS | Base System: Base Board, Fans & Power Supply | 37.1 |
| 404-40124 | SBC C300 based DSP Card | 536.4 |
| 404-40002 | SBC C900 based DSP Card | 599.0 |
| 404-40232 | SBC 1K Dual DS1 card | 227.4 |
| 404-40290 | SBC 1K Single DS1 card | 755.9 |
| 404-40227 | SBC 1K 4 port FXS Lower Card | 204.1 |
| 404-40403 | SBC 1K 4 port FXS Lower Card (NR) | 283.0 |
| 404-40228 | SBC 1K 4 port FXS Upper Card | 397.1 |
| 404-40229 | SBC 1K 4 port FXO Lower Card | 516.9 |
| 404-40230 | SBC 1K 4 port FXO Upper Card | 529.5 |
| 404-40231 | SBC 1K 4 port BRI Card | 276.7 |
| 423-40341 | SBC 1K P4505 SBA Assembly | 29.5 |
| 423-40342 | SBC 1K D525 SBA Assembly | 42.9 |
SBC 1000 Model Configuration Examples
| SBC Model | Description | MTBF in Years |
|---|---|---|
| SBC 1K-4FXS | Base + FXS Lower | 31.4 |
| SBC 1K-FXSFXO-S | Base + C300 DSP card + 2x FXS Lower + FXS Upper + FXO Upper + P4505 ASM | 13.0 |
SBC 2000
SBC 2000 Components / Accessories
| SBC Component | Description | MTBF in Years |
|---|---|---|
| SBC-2K-CHASSIS | Base System: Main Board, eUSB, Fans, Mid Plane, Single power supply | 19.8 |
| 404-40002 | SBC C900 DSP module | 599 |
| SBC-2K-CRD-T1E1 | SBC Telco Module, 8 T1/E1 ports | 200 |
| SBC-2K-CRD-24FXS | SBC Telco Module, 24 FXS ports | 55 |
| 423-40007 | SBC Application Solutions Module (SBA) | 27.7 |
| SBC-2K-PSU-AC | Additional AC Power Supply Module | 56.9 |
| SBC Model | Description | MTBF in Years |
|---|---|---|
| SBC-2K-S-1 | Chassis + SBA + C900 DSP | 11.3 |
| SBC-2K-2 | Chassis + 2x C900 DSP | 18.6 |
The equation below can be used to calculate the MTBF for different combinations of models and accessories.
Total MTBF = 1/ ((1/MTBF of Base System) + (1/MTBF of first desired accessory) + (1/MTBF of second desired
accessory) ...)
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