Avaya SIP Software 4.0 for 1200 Series Manual de usuario descargar pdf (Pagina 235)

• The User ID field is empty and the Password field displays "****" when both SSH and

SFTP

are disabled and applied.

• The user can enable SSH or SFTP.

• The user must provide a valid user ID and password when the User ID field is empty, and

an application (SSH or SFTP) is selected. If a valid user ID and valid password are not

provided, and the user presses the Apply context-sensitive soft key, one of the following

error message appears:

- Error: User ID size: 4-12 – appears if a valid user ID is not provided.

- Error: Password size: 4-12 – appears if a valid password is not provided.

- Error: User ID size: 4-12 Error: Password size: 4-12 – appear if

both a valid user ID and a valid password are not provided.

TCP/TLS operation overview

TCP

is the alternative protocol the IP Deskphone uses when sending and receiving SIP

requests. Avaya recommends TCP for Avaya SIP-enabled entities.

When a server initiates a TCP or TLS connection to the IP Deskphone, the connection only

lasts as long as the server chooses to keep the connection open; a persistent connection is

not maintained by the IP Deskphone.

How the IP Deskphone uses TCP

TCP

is a connection-based protocol, which means the IP Deskphone must first establish a

connection with a target. This is done using a three-way handshake. After the handshake

process is complete and a connection is made, the IP Deskphone can send data over the TCP

connection. The data, which makes up a SIP request, can now be sent and received by either

side of the communication.

How the IP Deskphone uses TLS

ransport Level Security (TLS) is a protocol for establishing a secure connection between two

end-points. After a connection is established using TCP, TLS negotiates the cryptographic

parameters used to secure the traffic that is sent over that connection. TLS, Public Key

Cryptography, and X.509 certificates provide either mutual or server authentication.

• Mutual authentication occurs when both the client and the server have public key

certificates assigned, that are used during the TLS handshake, to validate the identity of

TCP/TLS operation overview

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Avaya SIP Software 4.0 for 1200 Series Manual de usuario Pagina 235