Matrix PRASAR UCS - Page 547

538 Matrix PRASAR UCS System Manual
• When the second digit '3' is dialed, the system finds a match for '13'.
• As '13' is common for all Call Forward options
76
, the system waits for the next digit to be dialed
• When the user dials the third digit '1', the system finds a match for '131'.
• If there is more than one access codes matching with '131', e.g. '1311', '1314', '1315' the system will wait
for the next digit to be dialed.
• If no further digit is dialed on expiry of the Inter Digit Wait Timer, the system understands the instruction as
'Call Forward - Unconditional' and waits for the destination phone number to be dialed.
Access Codes are related to various phases of a call. When a call is processed by a System, it goes through
a number of pre-defined phases.
Typically a call passes through the different phases as shown below:
Different access codes are dialed at different call phases. Station Codes and Logical Group Codes are dialed in the
'Dial' phase.
As different features are invoked in each call phase, Feature Access Codes are dialed at different call phases. For
example:
• Call Forward code is dialed at the 'Dial' phase'.
• DND Override code is dialed at the 'Routing' phase'
• Auto Call Back code is dialed at the 'Blocked' phase' as well as 'Placed' phase.
• Three-party Conference code is dialed at the 'Matured 2 way' phase.
'Idle' phase is when no code is dialed. In the 'Denied Phase' no code is allowed to be dialed.
Each access code in a single call phase may be of different lengths, but must be unique. For example, the
same access code cannot be used for two different features like Call Forward and Redial, since both these
features are invoked in the 'Dial' phase.
76. Call forwarding options: Unconditional, When Busy, When No Reply, When Busy or No Reply.
Idle Dial Routing Blocked Placed
Matured
2-Way
Matured
3-Way
Denied
No
activity.
Digits are
pressed on
the phone
keypad/dialed
from the
rotary.
Dial tone is
played.
The system
is processing
the call. The
call is neither
placed nor
blocked.
Beeps are
played.
The dialed
extension
is busy.
Busy tone
is played.
The dialed
extension is
ringing.
Ring Back
Tone is
played.
Connected
with the
dialed
extension.
Two-way
speech.
Connected
with two
extensions.
Three-way
speech.
No reply
from dialed
extension.
Error Tone
is played.