### Improving TFTP Reliability

TFTP can be problematic in busy networks. Two options are available to improve TFTP file download to 4600 Series IP Telephones:

- Set the Maximum Client limit (0 = unlimited) in the INI file (applies to all server modes), to control the number of individual telephones accessing the server, by storing a list of individual IP addresses. The server itself can handle hundreds of connections in parallel. The telephone, however, must download several files to complete an upgrade and may be blocked by others accessing the server. Setting a limit like 100 ensures that individual phones get more access to the server.
- Assign a Client Session time in seconds with 0 = unlimited. Setting a session time reserves a time slot on a server for that duration to allow file downloads to be completed. This parameter effectively triggers when the Maximum Client count limit is reached because until that point, all new requests from unique IP addresses are accepted.