Physical Security Manual

BT ISIS directive 
General Interest Visit 
Security Measures 

 SEC | POL | AO13 
ISIS directive 
Origin: Directorate of Security and Investigation 
Physical security Manual 

 General Interest Visits 

Although BT wishes to maintain good relations with the community, general 
interest visitors are not normally permitted into operational computer 
centres or buildings containing network equipment such as telephone exchanges. 
Visits to associated premises may be permitted but should not be actively 
encouraged. Any request for a visit should be considered on its merits by local 

 Policy 7.1 Security Measures 

 When visit is arranged, the following measures must be taken to minimise the 

 - Except in an emergency, formal entry and exit procedures must be scrupulously 

 - Visitors must be issued with passes. 

 - Parties must be organised so that they are of manageable size, to ensure that 
a BT person always accompanies and supervises all visitors. A ratio of five 
visitors to each BT guide, one of whom must be a manager, is recommended. 

 - The route and timetable must be pre-planned and strictly followed to avoid all 
'sensitive' areas. 

 - Areas of work that are demonstrated must be selected to avoid close-up viewing 
of 'sensitive' information (such as logging on procedures, network access 
numbers and customer data). 

 - BT people must be given adequate warning of impending visits so that sensitive 
information and access methods can be concleaded. 

 - Passwords must be changed after any such visit if it is considered that any 
passwords may have been seen. 

 - Any information handed out must be have been authorised by the local manager 
in accordance with the Information Security Code. 

 - Visitors must not carry cameras or electronic devices capable of interfering 
with computer or electronic systems. 

 Computer Security Manual (ISIS SEC|POL|AO12) 


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