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Appendix

Duress PINs

281

Siemens AB

A6V10276959

Security Products

18.11.2011

No of digits

= Number of variations (including the User or Engineer PIN)

The default Engineer PIN is 1111. See Engineer PINs [➙ 68] for more details.

21.11 Duress PINs

The last user PIN within each number of digits, i.e. for a 4 digit PIN this would be

9999, a duress PIN is not allowed on this user PIN.

The last user PIN that is allowed to have duress is the number of variations ‘-2’ or ‘-

3’ depending if Duress +1 or Duress +2 is used respectively i.e. for a 4 digit user

PIN using Duress +1 the total number of variations is 10,000 minus 2 = 9998 which

is the last user PIN that can be allocated duress.

If Duress +2 is used then the total number of variations is 10,000 minus 3 = 9997,

which is the last user PIN that can be allocated duress. Once a system has been

configured for Duress +1 or Duress +2 and users allocated, it must not be changed

unless all the users are deleted and re-allocated user PINs.

21.12 Automatic inhibits

The system supports automatic inhibits in the following instances.

21.12.1 Zones

When the UK & Commercial are selected (see Standards [➙ 151]), the system will

provide DD243 functionality. In this instance the system will inhibit zones under the

following conditions:



Entry zone will not cause an alarm signal to the central station and cannot be

part of a confirmed alarm and hence will be effectively inhibited as required by

DD243.



If a single zone is triggered and another zone is not triggered within the

confirmation time (30 min default) but the first zone is still triggered, then the

first zone will be automatically be inhibited and no further alarms will be

triggered from this zone during the set period.

21.12.2 Access PINs

For Grade 2 systems: After 10 unsuccessful attempts with the incorrect PIN, the

keypad or browser will be disabled for 90 s; after a further 10 attempts with the

incorrect PIN, the keypad or browser will be disabled for a further 90 s. Once a

correct PIN has been entered, it will reset the counter back to zero allowing for a

further 10 attempts before disablement.

For Grade 3 systems: After 10 unsuccessful attempts with the incorrect PIN, the

keypad or browser will be disabled for 90 s; after each further attempt with an

incorrect PIN the keypad or browser will be disabled for a further 90 s. Once a

correct PIN has been entered it will reset the counter back to zero allowing for a

further 10 attempts before disablement.

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