AudioCodes Mediant 4000 SBC User Manual page 325

User's Manual
Parameter
IPv6 Interface Name
ipv6if
[CpMediaRealm_IPv6IF]
Port Range Start
port-range-start
[CpMediaRealm_PortRangeStart]
Number of Media Session Legs
session-leg
[CpMediaRealm_MediaSessionLeg]
Port Range End
port-range-end
[CpMediaRealm_PortRangeEnd]
Default Media Realm
is-default
Version 7.2
Assigns an IPv6 network interface to the Media Realm.
By default, no value is defined.
To configure IP network interfaces, see Configuring IP
Network Interfaces on page 129.
Defines the starting port for the range of media interface UDP
ports.
By default, no value is defined.
Note:

You must either configure all your Media Realms with port
ranges or all without; not some with and some without.

The available UDP port range is according to the
BaseUDPport parameter. For more information, see
''Configuring RTP Base UDP Port'' on page 195.

The port must be different from ports configured for SIP
traffic (i.e., ports configured for SIP Interfaces). For
example, if the RTP port range is 6000 to 6999, the SIP
port can be less than 6000 or greater than 6999.
Defines the number of media sessions for the configured port
range.
By default, no value is defined.
(Read-only field) Displays the ending port for the range of
media interface UDP ports. The device automatically
populates the parameter with a value, calculated by the
summation of the 'Port Range Start' parameter and 'Number of
Media Session Legs' parameter (multiplied by the port chunk
size) minus 1:
start port + (sessions * port spacing) - 1
For example, a port starting at 6,000, 5 sessions and 10 port
spacing:
6,000 + (5 * 10) - 1 = 6,000 + (50) - 1 =
6,000 + 49 = 6,049
The device allocates the UDP ports for RTP, RTCP and T.38
traffic per leg in "jumps" (spacing) of 4, 5 or 10, configured by
the UdpPortSpacing parameter. For example, if the port range
starts at 6000 and the UDP port spacing is 10, the available
ports include 6000, 6010, 6020, 6030, and so on (depending
on number of media sessions).
For RTCP and T.38 traffic, the port offset from the RTP port
used for the voice session is one and two, respectively. For
example, if the voice session uses RTP port 6000, the RTCP
port and T.38 port for the session is 6001 and 6002,
respectively. However, you can configure the device to use the
same port for RTP and T.38 packets, by configuring the
T38UseRTPPort parameter to 1.
For more information on local UDP port range, see
''Configuring RTP Base UDP Port'' on page 195.
Defines the Media Realm as the default Media Realm. The
default Media Realm is used for SIP Interfaces and IP Groups
325
17. Control Network
Description
Mediant 4000 SBC