Telos Zephyr Xstream User Manual page 255

Dial Setups when using V.35/X.21
Dial setups are sometimes used as a "short‐cut" method of changing codec parameters when
using the V.35 option. If you are using one of the Xstream's V.35 interface modes (see Section 9
‐ V.35/X.21 Interface) you can use Dial Setups without phone numbers to conveniently changes
modes.
When a setup containing an entry for Number 1 or Number 2 (i.e. a phone number) is activated
and the Interface (in the third TEL menu) is set to V.35 Split or V.35 single the system will change
the interface to ISDN so that the number(s) may be dialed.
This arrangement allows for externally triggered ISDN backup in case of a failure of to a
dedicated data facility. The Panic Dial feature could be used to activate this setup by an external
device.
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HOT TIP!
You are combining two features in this case, so be sure to understand the following:
-There is no method to use a setup to change from ISDN to V.35.
-Therefore, your external panic dial trigger source should remain asserted.
-You can manually switch back to V.35 and then drop the ISDN call to restore the V.35
connection.
-Telnet or RS-232 commands allow for more sophisticated control options.
Dial Setups using Panic Dial Closures
Configuring an input to use panic dial is covered in Section 11.6. The hardware specifications for
the Parallel Control port are shown in Sections 3.2 & 3.4 (Guided Tour of the Hardware)
When a panic dial is triggered by asserting one of the inputs, the system takes the following
actions:
1. Any ISDN call(s) present will be dropped
2. The Dial Setup indicated for the input asserted will be triggered
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3. The connection will be maintained until the input is no longer asserted.
USER'S MANUAL
If one or more telephone numbers are present, the Interface setting
(in the third TEL menu) will be set to ISDN.
If the setup "includes" CODEC settings, the codec will be configured
to the settings stored when this Dial Setup was created.
The number entered as "number 1", if present, will be dialed.
If the first call completes the second call will be attempted (if two
numbers are present)
Section 11: THE WORKS – Detailed Menu Reference 243