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STRATA CIX - MEAN TIME BETWEEN FAILURE RATES

September 2009

We are pleased to provide current Mean Time Between

Failure (MTBF) rates for the Toshiba Strata CIX40,

CIX100, CIX200 and CIX670 systems, as well as the

5000 series of IP and digital feature phones.

This information is intended to assist your sales efforts by

substantiating Toshiba’s reputation for producing high

quality and very reliable telecommunication products.

One of the primary customer concerns when purchasing

business equipment is quality and reliability. That’s why

Toshiba’s telecommunications products are specifically

Designed for reliability, as well as efficiency and

performance.

Toshiba has established a well-deserved reputation for

quality and reliability as a worldwide manufacturer of all

types of electronic equipment. This reputation has

contributed significantly to our growth as one of the leading

suppliers of telecommunication systems, and is a key

component of our marketing strategy. As such, it is

important to have a method of measuring and quantifying

how reliable these products are.

MTBF RATES

Based on actual field data compiled over six months, the

minimum MTBF rates for the Toshiba Strata CIX40, CIX100,

CIX200 and CIX670 systems, and the 5000 series of IP and

digital feature phones are shown below. Because the same

proprietary IP and digital feature phones are used throughout

the Toshiba Strata product line, MTBF rates for feature

phones are provided separately from other system

components.

• Strata CIX40, CIX100, CIX200 and CIX670 average MTBF:

Major – 46.7 years.

Minor – 57.1 years.

• 5000 series IP feature phones – 50.3 years.

• 5000 series digital feature phones – 69.7 years.

DEFINITION

Toshiba distinguishes between the following two types of

failures:

• Major Failures are those where a problem is diagnosed that

renders the system completely inoperative. Parts used to

calculate major failures in the Toshiba Strata CIX systems are

base and expansion cabinets, common control components,

and power supplies.

• Minor Failures are those where a problem is diagnosed that

affects only part of the system, such as a single telephone

circuit or trunk circuit failure. Parts used to calculate minor

failures include all system and common control components,

including trunk and station interfaces, but not telephones.