66 SMG digital gateway
sip:user@host:port;uri-parameters
user—the number of a SIP subscriber.
@—a separator located between the number and domain of the SIP subscriber.
host—domain or IP address of the SIP subscriber.
port—the UDP port used for subscriber's SIP service operation.
uri parameters—additional parameters.
One of the additional SIP URI parameters is user=phone. If this parameter is specified, the syntax of the
SIP subscriber number (in the user part) should match the TEL URI syntax described in RFC 3966. In this case, the
device will process requests, which contain "+", ";", "=", "?" in the SIP subscriber number, and will automatically
add "+" before the callee number for international calls using the SIP-T protocol.
Common SIP settings
Local SIP port—the UDP port which is used to send and receive SIP messages.
Transport—the selected transport protocol which is used to send and receive SIP messages:
– TCP-prefer—the messages are received via UDP and TCP and sent via TCP. If failed to
establish a TCP connection, the messages are sent via UDP.
– UDP-prefer—the messages are received via UDP and TCP. The packets smaller than
1,300 bytes are sent via TCP, while the ones larger than 1,300 bytes—via UDP.
– UDP-only—use the UDP protocol only.
– TCP-only—use the TCP protocol only.
T1 timer—timeout for a request; upon expiration, the request is re-sent. The maximum
retranslation interval for the INVITE requests is equal to 64*T1.
T2 timer—the maximum retranslation interval for responses to the INVITE request and for all
requests except for the INVITE ones.
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