Avaya Definity Server R - Avaya Application Solutions Deployment Manual

Reliability and Recovery

Avaya DEFINITY Server R

Note:
This availability does not include availability of the customer's data networks,
Note:
PSTN contributions, or contributions due to power outages. A conservative
MTTR of 4 hours is assumed, which includes travel and repair time.
Table 51: Avaya DEFINITY Server R hardware availability for three reliability
configurations
Sub- Standard reliability
system (single processor complex)
Failures/
year
G3R 0.153
Processor
Complex
SCC1 or 0.153
MCC1
Media
Gateways
CSS Intf 0.1095
1. Running Avaya Communication Manager (September 30, 2002 data).
2. The lower number is the equivalent availability for MTTR of 2 hours, which is attainable with technicians
and spares on site. See also
244 Avaya Application Solutions IP Telephony Deployment Guide
1
MTBO Availability
2
(years)
(%)
6.5 99.993 /
99.997
6.5 99.993 /
99.997
9.1 99.995 /
99.998
Reliability and
High reliability
(duplicated processor complex)
Failures/ MTBO Availability
2
year (years)
(%)
<0.0109 >91.3 >99.9995
5
0.0657 15.2 0.99997 /
99.999
0.0876 11.2 99.996 /
99.998
availability.
Critical reliability
(duplicated processor complex)
Failures/ MTBO Availability
year (years) (%)
<0.01095 >91.3 >99.9995
<0.01095 >91.3 >99.9995
<0.01095 >91.3 >99.9995
2