Welltech IP Centrex 6850 V.1.5 - Manual (Page 20)

Welltech Computer Co., Ltd.
IP Centrex 6850 20
Figure 3.4-2
Parameter Description:
UDP Port: The local UDP port on which the SIP Stack listens.
Reliable Provision (100rel): Requited PRACK or not (100rel)
Max Call Leg: The maximum number of call-legs the SIP Stack allocates.
You should set this value to the maximum number of call you expect the
SIP Stack to handle simultaneously.
Max Transaction: The maximum number of transactions the SIP Stack
allocates. You should set this value to the maximum number of call you
expect the SIP Stack to handle simultaneously.
Max Register Client: The maximum number of Register-Clients the SIP
Stack allocates. You should set this value to the maximum number of call
you expect the SIP Stack to handle simultaneously.
Send Receive Buffer Size: Set the size of message buffer. The buffer used
by SIP Stack for receiving and sending SIP messages.
Reject Unsupported Extension: Yes or No
Message Pool Page Size: Used to hold and process all incoming and
outgoing message in the coming of encoded messages or message objects.
It is recommended that you configure the page size to the average
message size your system is expected to message.
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 going, coming 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,