uction initiatives? Is the bidder open to consortium arrangements between multiple customers? How will the bidder regulate price changes over multiple years? What type of guar- antees (ties to price index, and SO on) can be made to ensure prices will not increase beyond reasonable expectations? Does the bidder offer trade-in credit for the competitors' products and services? Are there specific limitations? All rates quoted in the bidder Rate Sheets must be good for one year and include update requests. Is there additional cost associated with support and technical assistance? If so, please provide details on the bidder's Rate Sheet. Does the bidder offer discounts for purchasing multiple years upfront? Is the bidder willing to engage in an incentive/discount structure if the agreed-upon volume targets are met? Is the bidder willing to share cost drivers within the business? Summary In this chapter, we tried to provide most of the information to prepare a RFP for your enterprise. This chapter assumes you have a large enterprise with many offices in differ- ent parts of the world. It is a challenging task to prepare a good RFP for such a large organization covering all areas to include technology, quality, delivery, business, costs, and SO on. We intentionally chose a larger enterprise to show you the complexity of the bidding system. Some smaller enterprises might not go through such a detailed process to select their SBC vendor; however, you might need to add even more clauses that are specific to your organization. At the end of the day, this is your network, and you have to make the judgment. Further Reading The following document provides additional information on the topics covered in this chapter: IETF RFC: The RFC repository maintained by the IETF Secretariat. http://www.ietf.org/rfc.html This page intentionally left blank Chapter 10 Deployment Scenarios This chapter covers the following topics: Enterprise SIP Trunk for PSTN access SMB SIP Trunk for PSTN access Additional deployment variations Troubleshooti