There is a guide
here, it's been a while so I wasn't sure if it was still valid. Having just tested out this scenario, I can confirm that this is how you do it...
On your OBi200 configure with the following:
- Navigate to the Service Providers > ITSP Profile D > SIP page:
- ProxyServer: 127.0.0.1
- X_SpoofCallerID: Yes (Put a tick in the box)
- Navigate to the Voice Services > SP4 Service page:
- X_ServProvProfile: D
- X_InboundCallRoute = {1001>(Mli):li}
- X_RegisterEnable: No (Remove tick)
- X_UserAgentPort: 5063
- X_Proxy: Yes (Put a tick in the box)
- AuthUserName: 1001
- AuthPassword: 1001
- Navigate to the Physical Interfaces > LINE Port page:
- InboundCallRoute: {SP4(1001@local_client),ph}
On your OBi1062 configure with the following:
- Navigate to the Service Providers > ITSP Profile D > SIP page:
- ProxyServer: ***Enter the IP address of your OBi202 here. E.g. 192.168.1.1***
- ProxyServerPort: 5063
- RegisterExpires: 60
- Navigate to the Voice Services > SP4 Service page:
- X_DisplayLabel: PSTN Line
- X_ServProvProfile: D
- AuthUserName: 1001
- AuthPassword: 1001
- Navigate to the IP Phone > Line Keys > Key 6 page:
- Service: SP4
- Name: PSTN Line
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You can now make and receive calls on your OBi1062 via your OBi202 and OBiLINE using the Line key 6 on your OBi1062 IP Phone. I have configured it this way to take into account that you might have other services configured against SP1, SP2 and that you might not want all calls to go out over the PSTN line by default.
EDIT: If you want to configure the phone to use the PSTN line as the primary line eliminating the need to press line key 6:
On your OBi1062 configure with the following:
- Navigate to the IP Phone > Phone Settings page: