AudioCodes Mediant 500 E-SBC User Manual page 704

Parameter
Media Latching
Web/EMS: Inbound Media
Latch Mode
CLI: inbound-media-latch-mode
[InboundMediaLatchMode]
New RTP Stream Packets
[NewRtpStreamPackets]
User's Manual
AccessList_End_Port, AccessList_Protocol,
AccessList_Use_Specific_Interface, AccessList_Interface_ID,
AccessList_Packet_Size, AccessList_Byte_Rate,
AccessList_Byte_Burst, AccessList_Allow_Type;
[\AccessList]
For example:
AccessList 10 = mgmt.customer.com, , , 32, 0, 80, tcp, 1, OAMP,
0, 0, 0, allow;
AccessList 22 = 10.4.0.0, , , 16, 4000, 9000, any, 0, , 0, 0, 0, block;
In the example above, Rule #10 allows traffic from the host
'mgmt.customer.com' destined to TCP ports 0 to 80 on interface
OAMP (OAMP). Rule #22 blocks traffic from the subnet
10.4.xxx.yyy destined to ports 4000 to 9000.
For a detailed description of this table, see ''Configuring Firewall
Settings'' on page 141.
Enables the Media Latching feature.

[0] Strict = Device latches onto the first original stream (IP
address:port). It does not latch onto any other stream during the
session.

[1] Dynamic = (Default) Device latches onto the first stream. If it
receives at least a minimum number of consecutive packets
(configured by New<media type>StreamPackets) from a
different source(s) and the device has not received packets
from the current stream for a user-defined period
(TimeoutToRelatch<media type>Msec), it latches onto the next
packet received from any other stream. If other packets of a
different media type are received from the new stream, based
on IP address and SSRC for RTCP/RTP and based on IP
address only for T.38, the packet is accepted immediately.
Note: If a packet from the original (first latched onto) IP
address:port is received at any time, the device latches onto
this stream.

[2] Dynamic-Strict = Device latches onto the first stream. If it
receives at least a minimum number of consecutive packets
(configured by New<media type>StreamPackets) all from the
same source which is different to the first stream and the device
has not received packets from the current stream for a user-
defined period (TimeoutToRelatch<media type>Msec), it
latches onto the next packet received from any other stream. If
other packets of different media type are received from the new
stream based on IP address and SSRC for RTCP and based on
IP address only for T.38, the packet is accepted immediately.
Note: If a packet from the original (first latched onto) IP
address:port is received at any time, the device latches onto
this stream.

[3] Strict-On-First = Typically used for NAT, where the correct
IP address:port is initially unknown. The device latches onto the
stream received in the first packet. The device does not change
this stream unless a packet is later received from the original
source.
Defines the minimum number of continuous RTP packets received
by the device's channel to allow latching onto the new incoming
stream.
704
Mediant 500 E-SBC
Description
Document #: LTRT-10427