typescript
// api/connect

    const redirectTo = assignedUser?.phone_number || redirectNumber;
    const conferenceUrl = `${BASE_URL}/api/departments/conference`
    const client = twilio(process.env.TWILIO_ACCOUNT_SID, process.env.TWILIO_AUTH_TOKEN);
    const callUpdated = await client.calls(callSID).update({
      url: conferenceUrl,
      method: "POST",
    });

    // 2) Dial the specialist
    const statusCallbackUrl = `${BASE_URL}/api/departments/participant-status`;

    const callCreated = await client.calls.create({
      to: redirectTo!,
      from: phoneNumber,
      url: conferenceUrl,
      method: "POST",
      callToken,
      statusCallback: statusCallbackUrl,
      statusCallbackMethod: "POST",
    });

    console.log("Call created:", callCreated);

    return NextResponse.json({
      status: "Call initiated successfully",
    });

typescript
// api/conference
import { NextRequest, NextResponse } from "next/server";
import twilio from "twilio";

export async function POST(request: NextRequest) {
  const formData = await request.formData();
  const callSID = formData.get("CallSid") as string;

  const client = twilio(process.env.TWILIO_ACCOUNT_SID, process.env.TWILIO_AUTH_TOKEN);

  console.log("Call SID:", callSID);

  const call = await client.calls(callSID).fetch();

  console.log("Call:", call);

  if (!call) {
    return NextResponse.json({ error: "Call not found" }, { status: 404 });
  }

  const VoiceResponse = twilio.twiml.VoiceResponse;
  const twiml = new VoiceResponse();
  // Put the caller(s) into a conference
  const dial = twiml.dial();
  dial.conference(
    {
      startConferenceOnEnter: true,
      endConferenceOnExit: true,
    },
    `call-${callSID}`
  );

  console.log("TWIML:", twiml.toString());

  return new NextResponse(twiml.toString(), {
    headers: {
      "Content-Type": "text/xml",
    },
  });
}