diff --git a/.rubocop.yml b/.rubocop.yml
index c76c911780686212200e06f1438ca587e7825db7..d0b95af5f9199af7fff5b3fa40e6d4e650f97c7e 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -40,6 +40,7 @@ Naming/MethodParameterName:
     - id
     - iq
     - db
+    - to
 
 Layout/IndentationStyle:
   Enabled: false
diff --git a/lib/call_attempt.rb b/lib/call_attempt.rb
index 9116caeea471876909f15ba0ddeab327ab9cc5ad..34b12805fe32eab0132292197e4c0fbc0abb6040 100644
--- a/lib/call_attempt.rb
+++ b/lib/call_attempt.rb
@@ -11,24 +11,21 @@ class CallAttempt
 		"cad_beta_unlimited-v20210223" => 1.1
 	}.freeze
 
-	def self.for(customer, other_tel, rate, usage, direction:, **kwargs)
+	def self.for(customer, rate, usage, direction:, **kwargs)
 		kwargs.merge!(direction: direction)
 		included_credit = [customer.minute_limit.to_d - usage, 0].max
 		if !rate || rate >= EXPENSIVE_ROUTE.fetch(customer.plan_name, 0.1)
 			Unsupported.new(direction: direction)
 		elsif included_credit + customer.balance < rate * 10
-			NoBalance.for(customer, other_tel, rate, usage, **kwargs)
+			NoBalance.for(customer, rate, usage, **kwargs)
 		else
-			for_ask_or_go(customer, other_tel, rate, usage, **kwargs)
+			for_ask_or_go(customer, rate, usage, **kwargs)
 		end
 	end
 
-	def self.for_ask_or_go(customer, otel, rate, usage, digits: nil, **kwargs)
+	def self.for_ask_or_go(customer, rate, usage, digits: nil, **kwargs)
 		can_use = customer.minute_limit.to_d + customer.monthly_overage_limit
-		kwargs.merge!(
-			customer_id: customer.customer_id,
-			from: customer.registered?.phone, to: otel
-		)
+		kwargs.merge!(customer_id: customer.customer_id)
 		if digits != "1" && can_use - usage < rate * 10
 			AtLimit.new(**kwargs)
 		else
@@ -38,7 +35,7 @@ class CallAttempt
 
 	value_semantics do
 		customer_id String
-		from(/\A\+\d+\Z/)
+		from String
 		to(/\A\+\d+\Z/)
 		call_id String
 		direction Either(:inbound, :outbound)
@@ -93,12 +90,12 @@ class CallAttempt
 	end
 
 	class NoBalance
-		def self.for(customer, other_tel, rate, usage, direction:, **kwargs)
+		def self.for(customer, rate, usage, direction:, **kwargs)
 			LowBalance.for(customer).then(&:notify!).then do |amount|
 				if amount&.positive?
 					CallAttempt.for(
 						customer.with_balance(customer.balance + amount),
-						other_tel, rate, usage, direction: direction, **kwargs
+						rate, usage, direction: direction, **kwargs
 					)
 				else
 					NoBalance.new(balance: customer.balance, direction: direction)
@@ -137,7 +134,7 @@ class CallAttempt
 	class AtLimit
 		value_semantics do
 			customer_id String
-			from(/\A\+\d+\Z/)
+			from String
 			to(/\A\+\d+\Z/)
 			call_id String
 			direction Either(:inbound, :outbound)
diff --git a/lib/call_attempt_repo.rb b/lib/call_attempt_repo.rb
index fb16917765059f03f0ae684b7be345eb970b7f46..52cc5f09c5907bb0864251ef5708c12626bc9ad5 100644
--- a/lib/call_attempt_repo.rb
+++ b/lib/call_attempt_repo.rb
@@ -10,19 +10,41 @@ class CallAttemptRepo
 		db Anything(), default: LazyObject.new { DB }
 	end
 
-	def find(customer, other_tel, direction: :outbound, **kwargs)
+	def find_outbound(customer, to, **kwargs)
+		find(
+			customer,
+			to,
+			direction: :outbound,
+			from: customer.registered?.phone,
+			to: to,
+			**kwargs
+		)
+	end
+
+	def find_inbound(customer, from, **kwargs)
+		find(
+			customer,
+			from,
+			direction: :inbound,
+			from: from,
+			to: customer.registered?.phone,
+			**kwargs
+		)
+	end
+
+protected
+
+	def find(customer, other_tel, direction:, **kwargs)
 		EMPromise.all([
 			find_rate(customer.plan_name, other_tel, direction),
 			find_usage(customer.customer_id)
 		]).then do |(rate, usage)|
 			CallAttempt.for(
-				customer, other_tel, rate, usage, direction: direction, **kwargs
+				customer, rate, usage, direction: direction, **kwargs
 			)
 		end
 	end
 
-protected
-
 	def find_usage(customer_id)
 		promise = db.query_defer(<<~SQL, [customer_id])
 			SELECT COALESCE(SUM(charge), 0) AS a FROM cdr_with_charge
diff --git a/web.rb b/web.rb
index 2740b5217d0c1118fabc955d75fa15e45f2bf2fb..53f73ec65152d0309b6a7f441ab88aed184fd944 100644
--- a/web.rb
+++ b/web.rb
@@ -246,12 +246,11 @@ class Web < Roda
 
 					r.post do
 						customer_repo.find_by_tel(params["to"]).then do |customer|
-							call_attempt_repo.find(
+							call_attempt_repo.find_inbound(
 								customer,
 								params["from"],
 								call_id: call_id,
-								digits: params["digits"],
-								direction: :inbound
+								digits: params["digits"]
 							).then { |ca| render(*ca.to_render) }
 						end
 					end
@@ -263,9 +262,9 @@ class Web < Roda
 					).find_by_tel(params["to"]).then { |customer|
 						EMPromise.all([
 							customer.fwd,
-							call_attempt_repo.find(
+							call_attempt_repo.find_inbound(
 								customer, params["from"],
-								call_id: params["callId"], direction: :inbound
+								call_id: params["callId"]
 							)
 						])
 					}.then do |(fwd, ca)|
@@ -302,7 +301,7 @@ class Web < Roda
 					customer_repo(
 						sgx_repo: Bwmsgsv2Repo.new
 					).find_by_format(from).then do |c|
-						call_attempt_repo.find(
+						call_attempt_repo.find_outbound(
 							c,
 							params["to"],
 							call_id: params["callId"],