Prepare the following required components:
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UCx250 PRI Gateway - UCx250 with PSTN PRI card acting as PRI Gateway.
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UCx Primary Server - UCx acting as the Primary Server
STEP ONE - Configure PRI trunk
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Install PRI-1S card in the UCx250.
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Configure the card under PSTN Cards.
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Configure the PRI trunk as a DAHDI Trunk.
STEP TWO - Configure SIP trunk
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Navigate to PBX -> IP Trunk Assistant page.
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Press the New Account button.
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Enter a unique name for this account in the Account Name field (it is recommended to NOT use spaces in the name)
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Select UCx in the Trunk Provider drop down list box.
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In the Host / IP field, enter the IP address of the UCx Primary Server. You can add a port number to the address suffixing with a colon followed by the port number (e.g. 192.168.1.200:5000).
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Press the Save button to create the new account.
STEP THREE - Configure Inbound Route
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Navigate to PBX -> PBX Configuration -> Inbound Routes.
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Enter a descriptive name for the route in the Description field. It is recommended to list the DID(s) in the name.
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Enter the DID number or pattern in the DID Number field.
Preceding the value with an underscore '_' indicates the following value is a pattern. For example: _2[345]X is to match any 3 digit DID number that starts with 23, 24 or 25.
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Scroll down to the Set Destination section, select Trunks followed by the SIP trunk built in STEP TWO.
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Press the Submit button to save the inbound route.
STEP FOUR - Configure Inbound Route(s) for calls coming from UCx to route out the PRI
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Navigate to PBX -> PBX Configuration -> Inbound Routes.
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Enter a descriptive name in the Route Name field. (e.g. From_UCX_11Digits)
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In the DID Number section, enter one or more dial patterns that the Gateway wiill receive from the Primary UCx Server. (e.g. _1xxxxxxxxxx)
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Scroll down to the Set Destination section, select Trunks followed by the PRI trunk built in STEP ONE.
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Press the Submit button followed by the Apply Config bar.
Note: You will need one route for each dial pattern, i.e. Local, International, etc.
STEP FIVE - Disable Features that could lead to Toll Fraud
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Navigate to the Dial Plan and Operational section of the PBX / PBX Configuration / Advanced Settings page.
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Find the entry Disallow Transfers for Inbound Callers and make sure it is set to Yes.
STEP ONE - Configure Inbound Route
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Navigate to PBX -> PBX Configuration -> Inbound Routes.
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Enter a descriptive name for the route in the Description field.
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Enter the DID number or pattern in the DID Number field.
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Scroll down to the Set Destination section, select the desired destination. Note this may be a Time Condition, IVR, Ring Group, etc.
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Press the Submit button to save the inbound route.
STEP TWO - Configure SIP trunk
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Navigate to PBX -> IP Trunk Assistant page.
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Press the New Account button.
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Enter a unique name for this account in the Account Name field (it is recommended to NOT use spaces in the name)
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Select UCx in the Trunk Provider drop down list box.
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In the Host / IP field, enter the IP address of the UCx250 PRI Gateway.
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Press the Save button to create the new account.