Matrix PRASAR UCS System Manual 537
Access Codes
What's this?
Access codes are short digit sequences dialed from an extension phone to instruct the System to perform a
function such as:
• Calling an extension.
• Calling a group of extensions (“Department Call”).
• Grabbing a trunk line or any trunk line from a group of trunks (“OG Trunk Bundle Group”).
• Invoking a feature. Activating or deactivating a feature.
Accordingly Access Codes are classified into:
• Station Codes: Codes used for calling extensions. These codes are also commonly referred to extension
numbers, phone numbers. For the purpose of this document, station codes are referred to as Flexible
Numbers.
• Logical Group Codes: Codes used for calling a group of extensions as in a Department group, a group of
trunks as in Outgoing Trunk Bundle Group.
Default logical group codes: the factory-set codes for Department Numbers start from 3901, 3902….
Outgoing Trunk Bundle Groups from 61, 62, etc.
• Feature Codes: Codes used for invoking a feature.
Default feature codes: there are different feature codes for every feature/function of the PRASAR UCS,
e.g.: '2' for Auto Call Back, '5' for Raid, '13' for Call Forward, etc.
Access codes may consist of single digits or a sequence of a maximum of 6 digits.
You can change the default access codes to codes of your choice. For example: the default Operator code
'9' can be changed to '0'; the default trunk access code for dialing Trunk Group1 can be changed from '61'
to '5'.
How it works
Whenever an access code is dialed from an extension, the system matches each digit in the code with the access
codes programmed within the system to determine the instruction, that is, whether it is an extension it must call, or
a trunk line it must grab, a port it has to activate, etc. The system processes the instruction when a match is found.
For example:
• An extension user dials 131 to set Call Forward.
• When the first digit '1' is dialed, the system finds a match. As several default access codes begin with '1'
the system waits for the next digit to be dialed.
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