Network
Transport
The protocol for sending and receiving SIP packages.
Note: This setting is provisioned. No adjustment usually necessary here.UDP
(the User Datagram Protocol) is used to send data packets over connectionless non-secure communication lines.
Note: If very large data packets are present, TCP is used instead of UDP. The maximum size of a data packet can vary according to the network. (RFC 3261 > TCP)TCP
(Transmission Control Protocol). Segments data into packets, from a specified size, and sends these individual data packets to the recipient address until receipt has been confirmed.
TLS
(Transport Layer Security). Encrypts data and transports it securely. TLS is primarily used to protect http connections e.g. for commercial transactions (https).
Further help under Provisioned Settings: AccountsRegistration expiry mode
The maximum time between sequential registrations on the server. Here, the softphone registers 10% sooner than configured, to take into account network delays and new transmissions.
Note: The registration process is used to inform the server of the PBX's location, to ensure that incoming calls are received correctly. Registration might be required for outgoing calls from the server.Subscription expiry
Enter the maximum time between sequential registrations.
Subscription expiry mode
After the set time, the softphone automatically sends a new log-off request to the server.
Subscription expiry
Sets the time after which the softphone sends a new log-off request to the server.
Keep alive time-out
After the set time, the softphone automatically sends a new log-off request to the server, to maintain the connection with the server.
Note: If the server does not receive a request, it is in an idling state and maintains the connection until the specified time has passed. Specify whether and for how long the server is to wait for a new request, here.Note: Ensure that the NAT (firewall, router) has the correct port assignment for TCP and UDP connections.Subscription expiry
Sets the time after which the softphone sends a new request to the server.
Further help under Provisioned Settings: AccountsRPort
NAT-processing on the basis of RFC 3881. Recommended for TCP and TLS configurations.
Further help under Provisioned Settings: AccountsRPort media
For NAT-related missing audio signals, for some defective implementations (e.g. if the client is behind a symmetrical NAT combined with a CUCM server).
Note: Only select this option if you really have to, for fault resolution.Further help under Provisioned Settings: AccountsSTUN
Custom STUN
Activates the use of the values entered in the following fields for the STUN server.
Global STUN
These global settings are used:Settings > Functions > Advanced > Global STUN. Consequently, the values entered here, in the account, are not applied.
Further help under Provisioned Settings: AccountsSTUN server
The STUN server that is to be used.
The following address should be used, as far as possible: stun.auerproxy.de.
Further help under Provisioned Settings: AccountsSTUN port
The STUN port that is to be used.
This port should be used, as far as possible:3478.
Further help under Provisioned Settings: AccountsSTUN refresh period
The interval at which the connection to the STUN server is refreshed.
Further help under Provisioned Settings: Accounts