VOICE OVER IP INTERFACE
Installation and Operation Manual
16
Under Advanced Features, make sure that Silence Compression is “unchecked”.
Under Automatic Disconnection, set the Call Duration to “3600” secs.
For VoIP units connected to emergency phones in a many-to-one configuration or for one-to-one
configurations (For more information on many/one-to-one configurations, see VoIP System
Design p. 12), it is recommended that you enable the Auto Call feature.
The Auto Call feature automatically links the emergency phone to the dial tone of the PBX
extension or phone line, so the emergency phone only needs to dial the extension or phone
number to reach the attendant at the head end.
Under Auto Call/OffHook Alert, select “Auto Call” from the pulldown menu and specify the
Phone Number that you would like the emergency phone to dial. Please reference Phone Book
Design (p. 18) for clarification on the phone number you should enter in this field. For head end
units of a many-to-one configuration, select “None” under Auto Call/OffHook Alert.
If you know of any other specific parameter values that will apply to your system, enter them.
Most of the time, all the channels on the multi-channel VOIP units will share the same parameter
values. To facilitate settings duplication, you can copy parameter settings from one channel to
another. Click Copy Channel. Select Copy to All. Click Copy. At the main Voice/Fax
Parameters screen, click OK to exit from the dialog box.
6. Go to Configuration | Interface. Select Interface Type | “FXS” if connecting to emergency
phones or for head end of “closed system” (ringing phone directly off head end VOIP unit without
any external phone lines or PBX), “FXO” for head end VOIP unit(s) (connecting to PBX
extensions or analog phone lines).
If the VoIP unit will be using an “FXS” interface, make sure that FXS Options | Current Loss is
“checked”. This will allow the emergency phone to hang up automatically when a call is over.
Go to Disconnect on Call Progress Tone and make sure that it is “checked”.
Under Flash Hook Options, set the Detection Range to a minimum of “100” ms and a maximum
of “150” ms.
If you know of any other specific parameter values that will apply to your system, enter them.
Most of the time, all the channels on the multi-channel VOIP units will share the same parameter
values. To facilitate settings duplication, you can copy parameter settings from one channel to
another. Click Copy Channel. Select Copy to All. Click Copy. At the main Voice/Fax
Parameters screen, click OK to exit from the dialog box.
7. Go to Configuration | Regional Parameters. Select Custom from the Country/Region
pulldown menu. Now change the entries for the following types:
Unobtainable Tone:
Survivability Tone:
Frequency 1 = 480
Frequency 1 = 480
Frequency 2 = 620
Frequency 2 = 620
Cadence 1, 2, 3, 4 = 500
Cadence 1, 2, 3, 4 = 500
Reorder Tone:
Frequency 1, 2 = 999
Cadence 1, 2, 3, 4 = 0
