diff --git a/README.md b/README.md
index eaf7d14..9c42cc8 100644
--- a/README.md
+++ b/README.md
@@ -8,4 +8,12 @@ This is purposely minimal and unexciting. However, feel free to use, change, and
 
 Using it? Tell us how and where. We'd love to hear!
 
+## Configuration
+
+### FORWARD_PHONE_TO
+
+Set this to a phone number to temporarily forward all calls to that number.
+Must include area code and not have any spaces or other special characters
+(e.g. 5558675309).
+
 © 2014-2018, 2022 [Collective Idea](https://collectiveidea.com/)
diff --git a/views/welcome.builder b/views/welcome.builder
index 48b4754..c2e6ac4 100644
--- a/views/welcome.builder
+++ b/views/welcome.builder
@@ -1,4 +1,9 @@
-xml.Gather timeout: 5, action: "/menu", numDigits: "1" do |g|
-  g.Play sound_url("welcome")
+if ENV["FORWARD_PHONE_TO"].present?
+  # Number must include area code and not have any other special characters.
+  xml.Dial ENV["FORWARD_PHONE_TO"]
+else
+  xml.Gather timeout: 5, action: "/menu", numDigits: "1" do |g|
+    g.Play sound_url("welcome")
+  end
+  xml.Hangup
 end
-xml.Hangup