168 3Com VCX V7111 VoIP SIP Gateway User ManualField Name DescriptionCid Port NumberRedirectPhonNum Redirection Phone NumberConfiguration ExamplesEstablishing a Call Between Two GatewaysAfter you’ve installed and set up the VCX V7111, you can ensure that it functions asexpected by establishing a call between it and another gateway. This section exemplifieshow to configure two 8FXS SIP gateways in order to establish a call. After configuration, youcan make calls between telephones connected to a single 8FXS gateway or between the two8FXS gateways.In the following example, the IP address of the first gateway is 10.2.37.10 and its endpointnumbers are 101 to 108. The IP address of the second gateway is 10.2.37.20 and itsendpoint numbers are 201 to 208.In this example, a SIP Proxy is not used. Call routing is performed using the internal ‘Tel toIP Routing’ table.To configure the two gateways, follow these steps:1 Configure the following settings on the first 8FXS gateway (10.2.37.10): In the ‘Endpoint Phone Numbers’ screen, assign the phone numbers 101 to 108 for thegateway’s endpoints.2 Configure the following settings on the second 8FXS gateway (10.2.37.20): In the ‘Endpoint Phone Numbers’ screen, assign the phone numbers 201 to 208 for thegateway’s endpoints.3 Configure the following settings for both gateways: In the ‘Tel To IP Routing’ screen, in the first row, enter 10 in the ‘Destination PhonePrefix’ field and enter the IP address of the first gateway (10.2.37.10) in the field ‘IPAddress’. In the second row, enter 20 and the IP address of the second gateway(10.2.37.20) respectively.These settings enable the routing (from both gateways) of outgoing TelÆIP calls thatstart with 10 to the first gateway and calls that start with 20 to the second gateway.
