After passing Microsoft 70-638 Exam, you would be eligible for the following certification(s):
Microsoft Certified Technology Specialist (MCTS): Office Communications Server 2007, Configuration

Moreover this exam is also reckoned as a credit for the following Certifications:
* (MCSA) on Windows Server 2003
* (MCSE) on Windows Server 2003
* (MCSA) on Microsoft Windows 2000 Server
* (MCSE) on Microsoft Windows 2000 Server
70-638 Exam Benefits:
70-638 exam has great prospects to bring a lucrative job for you as all well-known and reputed organizations are always at hunt to recruit Microsoft Certified Professionals and these organization offer fringe benefits along with other handsome salaries.
How to prepare for this exam?
There are a number of tools for the preparation of Exam 70-638 which includes 70-638 exam questions and Preparation Guides. (Microsoft Office Communications Server 2007) but it is very essential to keep yourself updated because there are always changes occur in the syllabus of the exam by the Vendor so you can join Microsoft Certification Forum to keep yourself updated regarding these changes. On the internet lot of websites providing study materials such as practice exam, study guides and questions and answers, but your will be very carefull before buying those study material.
MCITP Training.