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The X1 TDM - IP Telephony Switch is capable to perform detection and alarm some predefined conditions in the switching system, connected equipment and interfaces. The optional audio visual alarm panel of the X1 has been designed for this purpose.

The alarm panel has 8 long life led lamps marked from Alarm1 to Alarm8. The Alarm1 is also associated with a buzzer, which can be turned on or off with a switch at the bottom.


Programming alarm conditions for each led lamp is done through the web connection. First an alarm number is selected to be programmed.

In the page of the relevant alarm number, conditions, which will trigger the selected alarming led, are programmed. Up to 32 conditions may be assigned to the same alarm led such that if any condition is detected by the system, the alarm led lights on.

Some possible conditions, which can be assigned are:

  • Successive alarms: It is possible to assign successive alarms to trigger the selected alarming led. In other words, Alarm6, Alarm7 and/or Alarm8 may be the conditions for the Alarm5. In such a case, whenever Alarm6, Alarm7 and/or Alarm8 become active (i.e., led(s) lights on) the Alarm5 becomes active automatically too. The feature may be useful to organize alarms as major or minor ones. To illustrate, the Alarm1, which is associated with the buzzer for audio, may be organized as a major alarm with bringing several other alarms triggering it.
  • Block availability: The X1 lists all E1/Analog/Digital blocks, which can be served by the control/switching module. The alarm condition occurs whenever there is no communication between the block and the control/switching unit. Note that, the reason for the missing communication may not be always a fault. For instance, the X1 may be supporting up to 14 blocks but it may be configured with 4 blocks. So that, assigning unused blocks for alarm conditions will be irrelevant and confusing.
  • E1 availability: The X1 lists all the available E1 interfaces within the system. The alarm condition occurs whenever layer1 or layer2 communication is lost on the E1 (i.e., the E1 is not in operation). Note that, out of operation case may not always indicate a fault. For instance, there may be some E1 interfaces, which are not connected to the network, consequently they are always in alarming condition. So that, assigning unused E1s for alarm conditions will be irrelevant and confusing.
  • External alarm: To supervise the surrounding equipment, it is possible to connect 8 external alarm points to the Telesis X1 TDM - IP Telephony Switch. In other words, the X1 is capable of accepting alarm conditions which may come from the remote units, as open or short circuit states on the external alarm connector of the PAI board. An alarm is indicated at such a point when a short circuit state occurs on the relevant conductors of the external alarm connector.

Alarm IO on the PAI board. 1 is input for external alarm detection whereas 2 is the output connected to the alarm panel

When a condition is detected, the X1 stores this information. When the situation is resolved, the state is changed automatically.

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Page last modified on January 04, 2011, at 02:56 AM EST
Subject to change without any notice. All rights reserved 2010 - Telesis A.S.
Iskitler Cad. No.68 Ankara, TURKEY. Tel: +90 312 3840540 Fax: +90 312 3840549