Several major telcos have recently announced their wish to enter the cloud computing services market. During the past years, operators have moved beyond broadband voice and data into network-dependent applications like videoconferencing and telepresence and have secured deeper enterprise relationships. Providing hosted solutions to the companies is the next move many carriers are considering today. Indeed, telecommunication providers could play an important and lucrative role in the burgeoning world of cloud computing by combining their natural advantages as network operators with a new wave of technological innovation. The opportunity represented by cloud-based services is potentially immense because, for starters, it increases the value of carrier networks in multiple ways and creates new roles and revenues for telecom service providers. First, clouds will increase network traffic and utilization and thus transport revenues. Second, in physically delivering cloud-based services, telecom carriers have an opportunity to extract two revenue streams from the same function. Moreover, emerging telco technologies such as IMS and next-generation networks service architectures are developing into logical service components that could also fit comfortably in cloud environments.		A telco will have to acquire or develop hosting and managed applications and combine that technology with Internet data centers. It will then be able to offer managed networking, security, storage and computing services. Its customers will be able to order on-demand Windows and Linux environments, as well as most common software applications, including Oracle and SAP. Such a move implies however new technical issues for a carrier. Plans for data center evolution that would help usher in the cloud services era supposes that a Carrier has previously offloaded its router's control planes to discrete servers and added virtualization capabilities in its networking gear that echo the same trend in servers. The data-center fabric must be designed to scale to thousands of 10-gigabit-per-second Ethernet ports and drastically reduce latency in data center networks. Telcos have also the disadvantage of not being IT integrators. Companies are looking for providers that have complex IT skills and can integrate multiple systems. This is a major issue for carriers. During the Cloud Telco conference, to be held in Novotel Paris CDG from 1st to 4th of June, 2010, project leaders, manufacturers and service developers will address these aspects in detail through up to date contributions. The call for proposals is in online.