BroadSoft SIP Trunk
Quick Guide 30 Document #: LTRT-14020
5.5 Configure PSTN Interface
This section describes the configuration of the public switched telephone network (PSTN)
related parameters.
5.5.1 Configure PRI Trunk Settings
This step shows how to configure the PRI Trunk.
To configure the PRI PSTN interface:
1. Open the Trunk Settings page (Setup menu > Signaling & Media tab > Gateway
folder > Trunks & Groups > Trunks).
2. Configure following parameters per PSTN network:
Parameter Value
Protocol Type
E1 EURO ISDN
Clock Master
Generated (The device is clock master)
Recovered (The device slaves from the line clock)
Framing Method
E1 Framing MFF CRC4 Ext (per remote side, PBX or
PSTN, definitions)
ISDN Termination Side
Network side or User side (per remote side definitions)
Local ISDN Ringback Tone Source
Gateway
Figure 5-17: Configuring the PRI PSTN Interface
3. Repeat for another PRI trunks if applicable (Mediant 800B and Mediant 1000B)
4. Reset the device with a save-to-flash for your settings to take effect.
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