I am using callcentric for my VOIP service. When I use Voicent to call, I got an error message: ‘Failed. No answer. SIP Error: 403 Not subscribed’. How do I resolve this

Normally this issue is not related to your VOIP settings, in your case, callcentric settings (please see configure Callcentric service for Voicent for more details). It seems that the gateway is started successfully with VOIP/sip lines.

This error is usually related to your VOIP service, such as not having enough funds left in your account, or the number you are calling is not allowed under your rate plans. To find out more, it is recommended to use Voicent AgentDialer semi-automatic mode. Make a call to the same phone number and hear what the service message is over the phone. Or contact your service provider asking why the call is not allowed.

I currently have licensed to use two lines but presenlty I am only able to use one line via SIP broadcasting. I have confirmed that the account is configured to make 4 calls but I am only able to use one during the BroadcastByPhone. I have noticed that I can only use one line at a time with Xlite since that is the limitation of the free version. Would Xlite configuration have anything to do with the SIP configuration in the Voicent Gateway Options.

No, x-lite settings have nothing to do with Voicent. Have you set Voicent Gateway to start 2 SIP lines using your SIP account?

I had two lines set before but I realize I had to exit Xlite to make it work