Remote Media Gateway Model

The Remote Media Gateway Model object is a child of the Remote Media Gateway Models object. It allows you to configure standard parameter settings that are used by one or more Subscriber Gateways, Registered SIP Bindings, Configured SIP Bindings or Trunk / Access Gateways.

If the NE is to support SIP access, you need to do one or more of the following.


Any Remote Media Gateway Model with a name that begins MetaSwitchMediaGateway is for use by MetaSwitch Trunk / Access Gateways. Only a MetaSwitch support engineer can create or delete these models.



You cannot delete or disable a Remote Media Gateway Model if one or more active Subscriber Gateways, Registered SIP Bindings, Configured SIP Bindings, or Trunk / Access Gateways refer to it. You need to disable all of these objects before you can disable the Remote Media Gateway Model. If you need to delete a Remote Media Gateway Model that is in use by one or more Registered SIP Bindings, first disable the subscribers (Individual Lines or Business Group Lines) associated with these Registered SIP Bindings. If an existing Remote Media Gateway Model is in use by a Registered SIP Binding, and you have defined a new Remote Media Gateway Model with a name that is a better match for the user agent information, disable and re-enable the associated subscriber; this forces the SIP device to use the new model.


Parameter

Access

Description
Category Create Specifies the type of gateway to which this model applies. Values:
  • Trunk / Access
  • Subscriber
  • SIP
Model index Read only The EMS's identifier for this Remote Media Gateway Model. This is used to identify the object when using the EMS's configuration export / import function.
Model name Change Inactive A text string used in the EMS System Explorer to identify this Remote Media Gateway Model. Specify a string of up to 64 characters, which must not match the name of any other Remote Media Gateway Model. Names beginning with MetaSwitchMediaGateway are reserved for use by MetaSwitch Trunk / Access Gateways; you cannot create a model with a name beginning with this string.
Description Change An optional text description of this Remote Media Gateway Model. Specify a string of up to 64 characters, which must not match the description of any other Remote Media Gateway Model.
Control protocol Change Inactive / Read only The control protocol used to communicate between the Call Agent and Media Gateways. If Category is set to Subscriber or Trunk / Access, select one of the following values:
  • MGCP
  • MeGaCo H248
For a MetaSwitch Trunk / Access Gateway (with a name beginning with MetaSwitchMediaGateway), this value must be MeGaCo H248. The default is MGCP for a subscriber gateway model and MeGaCo H248 for a Trunk / Access gateway model. If Category is set to SIP, this field is read only and is set to SIP.
Control protocol variant Change / Read only The variant of the control protocol used to communicate between the Call Agent and Media Gateways. This field is not visible if Category is set to SIP. If Control protocol is set to MGCP, select one of the following values:
  • MGCP V1.0 (default)
  • MGCP NCS V1.0
If Control protocol is set to MeGaCo H248, this field is read only, and is set to H248 text.
Authentication Change Inactive This field appears only if Control protocol is set to MGCP. Specifies whether the Subscriber Gateway's communications with the NE require authentication using HTTP Digest Security as defined in RFC2617. Values:
  • None (default)
    Authentication is not required for any Subscriber Gateway using this Remote Media Gateway Model.
  • Optional
    Authentication is optional; each Subscriber Gateway using this Remote Media Gateway Model can be configured to use authentication if necessary.
  • Mandatory
    All Subscriber Gateways using this Remote Media Gateway Model must use authentication.
Default model Change Inactive Specifies whether this Remote Media Gateway Model is the default model (which will be used for dynamically-created Media Gateways if a more appropriate model cannot be determined). This parameter applies only if Category is set to SIP. You cannot set this parameter to True on more than one Remote Media Gateway Model. Values:
  • True
  • False (default)
Supported low-bandwidth media formats Change Inactive Low-bandwidth formats, if any, that Media Gateways using this model can use to communicate with other Media Gateways. A low-bandwidth format can be used only if both Media Gateways in a call support the same format, and is not used if the subscriber line is a fax-only line. Specify zero or more of the following values:
  • G.726 32
  • G.729 AB
Preferred low-bandwidth media formats Change Inactive Preferred low-bandwidth formats for Media Gateways using this model. Specify one or more of the following values, or none to indicate no preference:
  • G.726 32
  • G.729 AB
Packetization interval Change Inactive Preferred media packetization interval, in milliseconds, for Media Gateways using this model. If this field is set to zero, the partner Media Gateway's packetization interval will be used instead. When programming endpoints, or when the packetization intervals are zero on both Media Gateways, then a default value will be used instead. Some individual media formats do not use this field, or may impose constraints on its value. For example, TDM and MF trunks do not require a packetization interval; G.729 requires a multiple of 10ms. If you specify an invalid value for the format in use, the default value for that format will be used instead.
Silence suppression allowed Change Inactive Specifies whether silence suppression is allowed for this Media Gateway. If two Media Gateways are connecting a call and both are configured to allow silence suppression, the link between them will be silence suppressed. Note that the Line Usage specified for a subscriber may indicate that a line is fax-only. If such a subscriber is already part of a call, silence suppression will not be used. Values:
  • True
  • False (default)
Supported connection types Change Inactive This field is not visible if Category is set to SIP. Specifies whether this Media Gateway supports Access Devices using analog connections, digital connections, or both. Select one or both of the following values. The default is analog only.
  • Analog
  • Digital
Access Device analog port name prefix Change Inactive A text string that will be used as a prefix in generating port names for new Access Devices using analog connections to this Remote Media Gateway Model. This field is not visible if Category is set to SIP, and appears only if Supported connection types includes the value Analog. Specify a string of up to 12 characters. If you do not specify a prefix, MetaSwitch uses the standard string AALN.
Access Device digital port name prefix Change Inactive A text string that will be used as a prefix in generating port names for new Access Devices using digital connections to this Remote Media Gateway Model. This field is not visible if Category is set to SIP, and appears only if Supported connection types includes the value Digital. Specify a string of up to 12 characters. If you do not specify a prefix, MetaSwitch uses the standard string ds/ds1.
Maximum simultaneous transactions outstanding Change Inactive The maximum number of outstanding transactions between the MetaSwitch Call Agent and the remote Media Gateway. You should not need to modify this setting except during integration or interoperability testing with new Media Gateways, or as instructed by MetaSwitch support personnel. Specify a value in the range 10 - 1000. The default is 300 if Control protocol is MeGaCo H248, and 100 otherwise.
Fix bits (MGCP, MeGaCo, SIP) Change Inactive A series of options that control the detailed behaviour of Media Gateways. You should not need to modify these settings except during integration or interoperability testing with new Media Gateways, or as instructed by MetaSwitch support personnel. Select zero or more of the following values:
  • Cannot be Hub * **
  • Simple contexts * **
  • No loopback between contexts **
  • Restricted Direct Media
  • Cannot play ringback * **
  • Cannot control endpoint connectivity * **
  • Cannot move contexts *
  • Connections always receive **
  • Does not support out of band DTMF *
  • Only supports sending out of band DTMF
  • Cannot report detection of call-type discrimination tones (this value is set by default for all control protocols)
  • Cannot do autonomous fallback for data calls
  • Requires out-of-band DTMF for all codecs
The values marked * above are set by default if the Media Gateway's control protocol is MGCP. The values marked ** above are set by default if the Media Gateway's category is SIP. The values Cannot be Hub, Simple contexts and Cannot report detection of call-type discrimination tones must remain set for a SIP Media Gateway.
Fix bits (MGCP, MeGaCo) Change Inactive This field appears only if Control protocol is set to MGCP or MeGaCo H248. A series of options that control the detailed behaviour of MGCP and MeGaCo Media Gateways. You should not need to modify these settings except during integration or interoperability testing with new Media Gateways, or as instructed by MetaSwitch support personnel. Select zero or more of the following values:
  • Single AALN tier *
  • Lower case names
  • Endpoint name is AALN/S
  • No embedded Digit Maps
  • Append /1 to endpoint name
  • Use IP Address, not domain name *
  • No port hierarchy
  • Use L/WT1 for standard waiting tone
  • Does not support connectivity testing
  • No support for wildcarded audits
  • MG does not support protection switch
  • Serialize all commands for same context
The values marked * above are set by default if the Media Gateway's control protocol is MGCP.
Fix bits (MGCP) Change Inactive This field appears only if Control protocol is set to MGCP. A series of options that control the detailed behaviour of MGCP Media Gateways. You should not need to modify these settings except during integration or interoperability testing with new Media Gateways, or as instructed by MetaSwitch support personnel. Select zero or more of the following values:
  • Does not support embedded actions
  • Does not support D/T timeout signal *
  • Only uses legacy ringback signal
  • Requires minimal SDP subset
  • Supports network disconnect (L/osi) signal
  • Endpoint names start at zero
  • Use connections not signals for COT response
  • Only use Generic OC event
  • Interpret RSIP Graceful with no delay as Inactive
  • Ignore Restart delays of length 1
The value marked * above is set by default if the Media Gateway's control protocol is MGCP.
Fix bits (MeGaCo) Change Inactive This field appears only if Control protocol is set to MeGaCo H248. A series of options that control the detailed behaviour of MeGaCo Media Gateways. You should not need to modify these settings except during integration or interoperability testing with new Media Gateways, or as instructed by MetaSwitch support personnel. Select zero or more of the following values:
  • Chooses own context indices *
  • Supports directed call progress tones (BCG package)
  • Supports additional call progress tones (XCG package)
  • Supports call services related tones (SRVTN package)
  • Supports additional call services related tones (XSRVTN package)
  • Supports the visual message waiting indicator (IND package)
  • Supports 1004Hz line test tone (ANSILT1004 package)
  • Supports MetaSwitch analog line state indications (METASWALST package)
  • Supports MetaSwitch extended caller ID delivery (METASWANDISP package)
  • Supports analog line configuration by the Call Agent (METASWALCONF package)
  • Supports additional MetaSwitch-specific signals (METASWSIG package)
  • Supports MetaSwitch announcements (METASWANN package)
  • Supports continuity testing using standard control (CT package)
  • Supports echo cancellation using standard control (TDMC package)
  • Supports continuity testing using MetaSwitch extended control (METASWCT package)
  • Supports echo cancellation using MetaSwitch extended control (METASWTDMC package)
  • Supports MF call control (METASWMF package)
  • Supports MF line configuration by the Call Agent (METASWMFCONF package)
  • Supports MetaSwitch message segmentation scheme (METASWSEG package)
  • Supports MGCP-style digit maps (XDD package)
  • Long text
  • Does not check profile
  • Supports UK analog line control (MSFUKAL package)
  • Supports UK call progress tones (MSFUKCG package)
  • No support for connection timeout detection (IT package)
  • MG does not support start of day reset flows
  • No support for named digit maps
  • Supports MetaSwitch diagnostics (METASWDIAGS package)
  • Supports call types (CTYP package)
  • Supports fax, text phone and modem tones detection (FTMD package)
  • Requires repeated call waiting signal
  • No support for MetaSwitch NE Identification (METASWNEID package)
The value marked * above is set by default if the Media Gateway's control protocol is MeGaCo H248.
Fix bits (MeGaCo) 2 Change Inactive This field appears only if Control protocol is set to MeGaCo H248. Additional options that control the detailed behaviour of MeGaCo Media Gateways. You should not need to modify these settings except during integration or interoperability testing with new Media Gateways, or as instructed by MetaSwitch support personnel. Select zero or more of the following values:
  • Supports MetaSwitch CALEA implementation (METASWCALEA package)
  • No digit buffering in event buffer
  • Use data signal not dwa signal for caller ID
  • Startup flows are UK MSAN gateway style
  • RTP codecs must be reserved
  • Quiet Termination (Megaco package)
  • Supports basic CAS events (BCAS package)
  • Supports basic CAS addressing (BCASADDR package)
  • Supports robbed-bit signaling events (RBS package)
  • Supports MF tone detection (MFD package)
Fix bits (SIP) Change Inactive This field appears only if Category is set to SIP. A series of options that control the detailed behaviour of SIP Media Gateways. You should not need to modify these settings except during integration or interoperability testing with new Media Gateways, or as instructed by MetaSwitch support personnel. If required, select the following value:
  • Supports SDP connectivity requests
  • Use E164 numbers
  • Can send/receive multiple 18X responses with updated SDP
  • Unrecognized SDP allowed
  • Include international access prefix
  • Expects unsolicited message waiting notifications
  • Expects unsolicited Call List notifications
The value Include international access prefix can be set only if the value Use E164 numbers is also set. The value Unrecognized SDP allowed can be set only if the value Restricted direct media is not set in Fix bits (MGCP, MeGaCo, SIP).
Reference count Read only This field tracks the count of gateways that refer to this gateway model. If one or more gateways refer to this gateway model, it cannot be deleted or disabled.
Export - number of objects exported Read only The total number of objects (including child objects) written to the export file so far in the current or most recent export operation.
Export - status Read only The status of the current or most recent export operation, if any. Values:
  • None
  • In progress
  • Succeeded
  • Failed
Export - file Change The name of the text file (in the EMS User's home directory on the EMS Server) to which configuration information for this object will be exported. The maximum length of the filename is 32 characters.
Export - log correlator Read only If the export status is Failed, this field contains a correlator for the log message that contains details of the failure. Click on the 'go to log' button next to this field to jump to this message in the EMS log viewer window.
Export - correlator metaswitch Read only If the export status is Failed, this field contains the name of the EMS Server or MetaSwitch Network Element that generated the failure log. You may need this information to find the log in the EMS log viewer window.
Requested status Read only Specifies whether an administrator has attempted to enable the Remote Media Gateway Model. Values:
  • Enabled
    The object has been enabled.
  • Disabled
    The object has not been enabled or has been disabled.
Actual status Read only Specifies the current status of the Remote Media Gateway Model. Values:
  • Enabled
    The object has been enabled.
  • Disabled
    The object has not been enabled or has been disabled.