User`s manual

SIP User's Manual 110 Document #: LTRT-83303
Mediant 1000 & Mediant 600
¾ To modify the CAS state machine parameters, take these 6 steps:
1. Open the ‘CAS State Machine' page (Configuration tab > PSTN Settings menu >
CAS State Machines page item).
Figure 3-56: CAS State Machine Page
2. Ensure that the trunk is inactive. The trunk number displayed in the 'Related Trunks'
field must be green. If it is red (indicating that the trunk is active), click the trunk
number to open the 'Trunk Settings' page (refer to ''Configuring the Trunk Settings'' on
page 96), select the required Trunk number icon, and then click Stop Trunk.
3. In the 'CAS State Machine' page, modify the required parameters according to the
table below.
4. Once you have completed the configuration, activate the trunk if required in the 'Trunk
Settings' page, by clicking the trunk number in the 'Related Trunks' field, and in the
'Trunk Settings' page, select the required Trunk number icon, and then click Apply
Trunk Settings.
5. Click Submit.
6. Reset the device (refer to ''Resetting the Device'' on page 262).
Notes:
• It's strongly recommended that you don't modify the default values unless
you fully understand the implications of the changes and know the default
values. Every change affects the configuration of the state machine
parameters and the call process related to the trunk you are using with
this state machine.
• You can modify CAS state machine parameters only if the following
conditions are met:
1) Trunks are inactive (stopped), i.e., the 'Related Trunks' field displays
the trunk number in green.
2) State machine is not in use or is in reset, or when it is not related to
any trunk. If it is related to a trunk, you must delete the trunk or de-
activate (Stop) the trunk.
• Field values displaying '-1' indicate CAS default values. In other words,
CAS state machine values are used.
• The modification of the CAS state machine occurs at the CAS application
initialization only for non-default values (-1).
• For a detailed description of the CAS Protocol table, refer to the Product
Reference Manual.