AudioCodes MEDIAPACK VERSION 6.2 - Manual (Page 57)

Version 6.2 57 December 2010
SIP Release Notes 1. What's New in Release 6.2
8. Classifying IP Call to Proxy Set based on IP Address, Port, and Transport Type:
Product
MP-11x MP-124
Mediant 600 Mediant 1000
Mediant 800 MSBG Mediant 1000 MSBG
Mediant 2000
Mediant 3000/TP-6310 Mediant 3000 HA/TP-6310
Mediant 3000/TP-8410 Mediant 3000 HA/TP-8410
Management Protocol
Web INI SNMP EMS CLI
This feature provides the ability to classify an IP call to a Proxy Set based on either its
IP address, or its IP address, port, and transport type (e.g., UDP). As a Proxy Set can
be defined with up to five Proxy IP addresses with or without associated ports and/or
transport type, this provides greater flexibility in classifying a call with a Proxy Set. This
feature is configured using the new parameter, ClassificationInput in the existing Proxy
Set table (ProxySet parameter).
9. SIP-Dialog Rate Control:
Product
Mediant 800 MSBG Mediant 1000 MSBG
Mediant 3000/TP-6310 Mediant 3000 HA/TP-6310
Mediant 3000/TP-8410 Mediant 3000 HA/TP-8410
Management Protocol
Web INI SNMP EMS CLI
This feature provides support for SIP-dialog rate control, using the “token bucket”
mechanism. The token bucket is a control mechanism that dictates the rate of SIP-
dialog setups based on the presence of tokens in the bucket – a logical container that
holds aggregate SIP dialogs to be accepted or transmitted. Tokens in the bucket are
removed ("cashed in") for the ability to setup a dialog. Therefore, a flow can setup
dialogs up to its peak burst rate if there are adequate tokens in the bucket and if the
burst threshold is configured appropriately:
• Every SIP dialog setup request must attempt to take a token from the bucket.
• If there are no tokens, the request is dropped.
• New tokens are added to the bucket at a user-defined rate (token rate).
• If the bucket contains the maximum number of tokens, tokens to be added at that
moment are dropped.
A token bucket is configured in the SBC Admission Control table
(SBCAdmissionControl parameter), using the following new parameters:
• Rate = Rate at which tokens are added to the bucket (i.e., token rate). One token
is added to the bucket every 1000/Rate milliseconds. The rate of dialog setups
per second, or unlimited if set to 0 (default).
• Max Burst = Maximum tokens that can fill the bucket. At any given time, the
bucket cannot contain more than this amount of tokens. The maximum burst size
for the dialog setup rate, unlimited if set to 0 (default).
Dropped requests are replied with the 486 “Busy Here” SIP response. Dropped
requests are not counted in the bucket.