What do FTP and Telnet accomplish in the context of the system?
FTP is typically used to store and retrieve data, in the form the files. That is a kind a data access. If this is how FTP is used, then FTP belongs in the data abstraction layer. For example, there might be a new component named Company.FtpDataBlock. FtpDataBlock component would play an analogous role a relational-data access component. Instead of connecting to a relational DB, it connects to an FTP server. The FTP server could be placed in the DatbaseServerSide rectangle, or you could create a new rectangle called "FileServerSide".
Business entities in the business layer would send requests to the data access layer for information. The data access layer then decides how fulfill the request by choosing the appropriate data access component. Ideally, the DAL insulates the business entities from knowing if the data store is an RDBM, FTP server, WebDAV server, NoSQL DB, or anything else.
Telnet is a little more difficult. Telnet is more general than FTP and is generally used for command and control. The FTP protocol is actually built on top of telnet, if I remember correctly.
If the application uses Telnet for command and control, then conceptually it does not not really belong in the data access layer. For practical reasons, you might end up treating it as a session-based data source. Issuing a command becomes a combination of a sychronous data-write (the command) and data-read (the response).
However, if Telnet is really used to issues commands to another system, then it should be in another box with a name like "Gateway" or "External System Access Layer". Architecturally you can treat Telnet like another other remote-procedure-call technology such as SOAP.
Of course, it all depends on how Telnet is being used.