Title of Service: Network Time Protocol Service

Status of Document: This document describes services offered in May 2012.

1. Introduction

1.1 The Network Time Protocol service allows accurate time synchronisation across computer networks.

2. Summary of OUCS’s responsibilities

Hours of Service

2.1 The service operates at all times.

2.2 Operator cover is provided from 08:30 to 20:30 on weekdays. Periodic monitoring takes place outside these hours, and informal arrangements exist for staff to be called, but no funding is provided to make this contractual.

2.3 If a fault is notified between 09:00 and 17:00 on a working day, OUCS will commence investigation and correction within one hour (provided that no similar fault is also being handled by the same team).

2.4 If a fault is notified outside these hours, OUCS will use its best endeavours to attend the fault, but no funding is allocated to this purpose.

Serviceability Targets

2.5 It is intended, as far as is possible, to maintain service of all components at all times.


2.6 The service is replicated on four servers. NTP software allows for fail-over from one server to another.

2.7 The machines providing the service are distributed between the 129.67 and 163.1 networks.

Alternative Facilities

2.8 Many public NTP servers exist.

Hardware and Software Maintenance

2.9 The machines used are maintained under warranty by the suppliers.

2.10 Software updates are applied by OUCS staff – this is done on a machine-by-machine basis, with no interruption to overall service.

System Development

2.11 There is no scheduled development time.

Administration and Support

2.12 Information for departmental and college system administrators is given at

3. Information

2.13 Notification of faults, outages, etc is circulated on the mailing list itss-announce@maillist.ox.ac.uk

4. Fault Reporting

2.14 Faults should be reported to help@oucs.ox.ac.uk. OUCS will liaise with department and College computing officers: no end-user support is provided.

5. Education and Training

2.15 Not applicable.

6. Summary of client’s responsibilities

3.1 Not applicable.

7. Premium services

4.1 Not applicable.