Version 6.0 45 February 2010
Installation Manual 3. Configuring the Device
3.3 Configuring PSTN Trunks
This section describes how to configure the configure the device's E1/T1 PRI and BRI
trunks.
¾ To configure the trunks:
1. Open the ‘Trunk Settings’ page (Configuration tab > PSTN Settings menu > Trunk
Settings).
Figure 3-5: Trunk Settings Page
2. Click the Stop Trunk
button (located at the bottom of the page) to de-activate the
trunk so that you can configure currently grayed out (unavailable) parameters. (Skip
this step if you want to configure parameters that are also available when the trunk is
active).
Note: You cannot stop a trunk if it provides the device’s clock (assuming the device
is synchronized with the E1/T1 clock). If this is the case, then assign a
different E1/T1 trunk to provide the device’s clock or enable ‘TDM Bus PSTN
Auto Clock’ in the 'TDM Bus Settings' page.
3. From the ‘Protocol Type’ drop-down list, select the required protocol.
Notes:
• If the ‘Protocol Type’ field displays 'NONE' (i.e., no protocol type
selected) and no other trunks have been configured, after selecting a PRI
protocol type, you must reset the device.
• After selecting a PSTN protocol in the ‘Protocol Type’ field, only the
relevant parameters for this protocol are displayed.
• Different protocols (CAS or ISDN variants) can be defined between
trunks (subject to the constraints in the device's Release Notes).
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