This iDRD (Insight-Based Data-Rich Deliverable) is part of the Business Networks and Business IP subscriptions. This 11-page report discusses and analyzes the top carrier IP trends in terms of investment, build-out, and replacement of TDM-based networks with IP. Included in this report are trends in IMS (IP Multimedia Subsystems), MPLS (Multi-Protocol Label Switching), and IP (Internet Protocol) infrastructure investment and build out. IP or Internet Protocol includes all voice and data traffic carried over an IP-based network or infrastructure. The Expert Guide for this report is Stephanie Atkinson.