SIP User's Manual 116 Document #: LTRT-12804
Mediant 800 MSBG
Parameter Description
Media Realm
[SRD_MediaRealm]
Determines the media ports associated with the specific SRD. This is
the name as defined in the 'SIP Media Realm' table (CpMediaRealm).
The valid value is a string of up to 40 characters.
Notes:
The string must be identical to that configured in the 'SIP Media
Realm' table (i.e., case-sensitive etc.).
If the Media Realm is later deleted from the 'SIP Media Realm'
table, then this name becomes invalid in the SRD table.
Internal SRD Media
Anchoring
[SRD_IntraSRDMediaAncho
ring]
Determines whether the device performs media anchoring or not on
media.
[0] Anchor Media (default) = RTP traverses the device and each
leg uses a different coder or coder parameters.
[1] Don't Anchor Media = The RTP packet flow does not traverse
the device; instead, the two SIP UA's establish a direct RTP/SRTP
(media) flow between one another.
Notes:
When No Media Anchoring is enabled:
9 The device does not perform manipulation on SDP data
(offer/answer transactions) such as ports, IP address, and
coders.
9 Opening voice channels and allocation of IP media ports are
not required.
When two UA's pertain to the same SRD and this parameter is set
to [1], and one of the UA's is defined as a foreign user (example,
“follow me service”) located on the WAN while the other UA is
located on the LAN, then calls between these two UA's can’t be
established until this parameter is set to 0, as the device doesn’t
interfere in the SIP signaling. In other words, parameters such as
IP addresses are not manipulated for calls between LAN and WAN
(although required).
When the global parameter SBCDirectMedia is disabled, you
cannot enable No Media Anchoring for two UA's pertaining to
separate SRDs; No Media Anchoring can only be enable for two
UA's pertaining to the same SRD.
For a detailed description on media handling, see SBC Media
Handling on page 493.
Block Unregistered Users
[SRD_BlockUnRegUsers]
Determines whether the device blocks incoming calls (INVITE
requests) from unregistered users (pertaining to USER-type IP
Groups).
[0] No = Calls from unregistered users are not blocked (default)
[1] Yes = blocks unregistered users
Note: When the call is rejected, the device sends a SIP 500 "Server
Internal Error" response to the remote end.
Max Number of Registered
Users
[SRD_MaxNumOfRegUsers]
Maximum number of users belonging to this SRD that can register with
the device. By default, no limitation exists for registered users
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