Welltech WG5260 V.6.2 - Manual (Page 64)

Welltech Computer Co., Ltd.
WellGate 5260 User Guide – V6.2.0 - 64 -
• General Pool Page Size: Used by SIP Stack objects, such as call-legs
and transaction, to store the internal fields. For example, the call-legs
object will store the To, From and Call-ID headers and the local and the
remote contact addresses on the general pool pages. The general pool
is also used from other activities that demand memory allocation.
• Application Pool Page Size: The size of page in the application pool
• Retransmission T1: T1 determines several timers as defined in
RFC3261. For example, when an unreliable transport protocol is used, a
Client Invite transaction retransmits requests at an interval that start at
T1 seconds and doubles after every retransmission. A Client General
transaction retransmits requests at an interval that starts at T1 and
doubles until it reaches T2. (Default Value: 500)
• Retransmission T2: Determines the maximum retransmission interval as
defined in RFC3261. For example, when an unreliable transport protocol
is used, general requests are retransmitted at an interval which starts at
T1 and doubles until reaches T2. If a provisional response is received,
retransmission continue but at an interval of T2. (Default Value: 4000)
• Retransmission T4: T4 represents the amount of time the network takes
to clear message between client and server transactions as defined in
RFC3261. For example, when working with an unreliable transport
protocol, T4 determines the time that UAS waits after receiving an ACK
message and before terminating the transaction. (Default Value: 5000)
• Invite Linger Timer: After sending an ACK for an INVITE final response, a
client cannot be sure that the server has received the ACK message; the
client should be able to retransmit the ACK upon receiving
retransmissions of the final response for invite Linger Timer milliseconds.
• General Linger Timer: After a server sends a final response, the server
cannot be sure that the client has received the response message. The
server should be able to retransmit the response upon receiving
retransmissions of the request for general Linger Timer milliseconds.
(Default Value: 32000)
• Provisional Timer: When a client receives a provisional response, it
continues to retransmit the request, but with an interval of provisional
Timer milliseconds.
• Cancel General No Response Timer: When sending a CANCEL request
on a General transaction, the User Agent waits cancel General No
Response Timer milliseconds before timeout termination if there is no
response for the cancelled transaction.
• Cancel Invite No Response Timer: When sending a CANCEL request on
an Invite transaction, the User Agent waits cancel Invite No Response
Timer milliseconds before timeout termination if there is no response for
the cancelled transaction.
• General Request Timeout Timer: After sending a General request, the
User Agent waits for a final response general Request Timeout Timer
milliseconds before timeout termination (in this time the User Agent
retransmits the request every T1, 2*T1,…T2,…milliseconds)
• 183 to Alerting: When receive a SIP 183 message from remote site,
send Alerting in stead of Call Progress Indicator
• Auto Send 183: WellGate5260 always send Call Progress Indicator (SIP