> # 3 Troubleshooting TCP/IP Connection Problems

> Establishing a TCP/IP connection between a SequeLink Client and a SequeLink service consists of the following steps.

> 1. A low-level TCP/IP connection is made from a SequeLink Client to a SequeLink Server that is listening on the specified TCP/IP port. See the following section "Establishing a TCP/IP Connection" for more information.
> 2. When this low-level TCP/IP connection has been established, the SequeLink Client exchanges operational parameters, or a handshake, with the SequeLink service. See "Connection Handshaking" for more information.

> This chapter describes situations that may cause TCP/IP connections between a SequeLink Client and a SequeLink service to fail. See "Error Messages" for information about the error codes referenced.