Chapter 8: Hardware Reliability - Avaya Advanced Gateway 2330 Installation Manual

Chapter 8: Hardware reliability

This section provides information about the reliability of the Avaya Advanced Gateway 2330 (AG2330)
hardware. This section uses the following terms:
• failures in time (FIT)—The number of failures for each billion (10
• mean time between failures (MTBF)—The average value of the time intervals between successive
outages of the system. This average value is calculated from, and based on, a large population of
nominally identical items.
The following table provides information for the expected reliability of AG2330 hardware in terms of FIT
and MTBF.
Important:
Ensure you install the AG2330 and its components correctly and operate the unit within the intended
environment under specified conditions. The failure rate and MTBF values in the following table do not
include failure caused by software or erroneous human action.
Table 20: AG2330 reliability
Hardware
Main board
PVIM
Internal AC/DC Power Supply
1-port T1/E1 Small Module
2-port T1/E1 Small Module
2-port ISDN BRI ST Small
Module
2-port ISDN BRI U Small Module 564 FITs
2-port FXS/DID SM
4-port FXS/DID SM
2-port FXO/CAMA SM
4-port FXO/CAMA SM
Installation — Hardware Components
Failure rate
1320 FITs
148 FITs
3 333 FITs
370 FITs
484 FITs
582 FITs
352 FITs
509 FITs
683 FITs
1218 FITs
9
) accumulated device hours.
MTBF
199 721 hours
6 765 463 hours
300 000 hours
2 702 372 hours
2 062 556 hours
1 717 202 hours
1 771 934 hours
2 838 448 hours
1 963 151 hours
1 463 068 hours
820 846 hours
August 2010 45