Tweak to title

Author: cdpark

articles/communication-services/concepts/telephony/direct-routing-provisioning.md

@@ -13,7 +13,7 @@ ms.subservice: pstn
 ms.custom: kr2b-contr-experiment
 ---
 
-# Use direct voice routing to connect existing telephony service
+# Use direct routing to connect to existing telephony service
 Azure Communication Services direct routing enables you to connect your existing telephony infrastructure to Azure. The article lists the high-level steps required for connecting a supported Session Border Controller (SBC) to direct routing and how voice routing works for the enabled Communication resource. 
 
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articles/communication-services/toc.yml

@@ -155,7 +155,7 @@ items:
         href: concepts/telephony/emergency-calling-concept.md 
       - name: Direct routing infrastructure requirements
         href: concepts/telephony/direct-routing-infrastructure.md
-      - name: Connect existing telephony infrastructure
+      - name: Connect to existing telephony
         href: concepts/telephony/direct-routing-provisioning.md
       - name: Certified Session Border Controllers
         href: concepts/telephony/certified-session-border-controllers.md