In this section:
Create a SIP Signaling Group:
From the Create Signaling Group drop down box, select SIP Signaling Group.
Signaling Group Table
Field definitions for the Create SIP Signaling Group window are listed by feature.
Quick Links - Configuration Options by Feature
Configure a SIP Signaling Group:
From the Create Signaling Group drop down box, select SIP Signaling Group.
Create Signaling Group
Configure the field options. Field definitions below are listed in SIP Signaling Group feature groups. See Quick Links - Configuration Options by Feature.
Create Signaling Group
SIP Signaling Group - Overview
Specifies the admin state of the Signaling group.
SIP Signaling Group - SIP Channels and Routing
Specifies a defined Action Set Table for this Signaling Group.
Specifies the Call Routing Table to be used by this Signaling Group.
Specifies the number of SIP channels available for calls in this Signaling Group.
Specifies the SIP Profile to use for this Signaling Group
Specifies the SIP Registration Mode to use in this Signaling Group.
If Fwd. Reg. After Local Processing is configured as the SIP Mode, the selected SIP Server Table for that same Signaling Group should not be configured with a Contact Registrant Table. The SBC does not support Fwd Reg. After Local Processing and a Contact Registrant Table in the same Signaling Group.
Specifies the way in which SIP-SIP signaling will be handled by the SBC. Valid entries:
Back-to-Back User Agent. The SBC will maintain state and participate in all SIP signaling between both endpoints.
Access Mode: When AccessMode is enabled, the SBC allows certain SIP functions to be sent in a pass through mode:
When Agent Mode is set to Access Mode, the Signaling Group service status will always show as "green" or "up" to allow for pass through messaging. Also, when Agent Type is set to Access Mode, the options Office 365 and Office 365 with AD PBX are disabled.
Default selection: Back-to-Back User Agent.
If Access Mode is specified, a source and destination signaling group must exist (e.g., Broadsoft Local Register SG to Broadworks Server SG).
Indicates if the SBC should interoperate in a proprietary manner for certain functionality. Multiple SIP Signaling Groups can enable this mode, but this mode can only be enabled once for each SIP Signaling Group/SIP Server combination.
Valid entries:
Standard. The SBC will interoperate according to RFC standards.
BroadSoft Extension. The SBC will support BroadSoft related extensions. Specifically, the SBC will use BroadSoft’s subscriber data (BroadWorksSubscriberData) while in remote survivability mode. This feature allows the SBC to retrieve and store alternative user information for use when the BroadSoft server is unreachable.
Office365. Indicates the Signaling Group is communicating directly with the Skype for Business Front End Pool.
Office 365 w/AD PBX. Indicates the Signaling Group is communicating directly with the Skype for Business Front End Pool. The SBC retrieves AD records (based on the entry in the AD Attribute field), and uses that to register on-premises PBX endpoints to Skype for Business Front End Pool.
Default entry: Standard.
When the Agent Type is set to Back-to-Back User Agent, the BroadSoft Extension option is not available.
The FQDN used in the Signaling Group to communicate directly with the Skype for Business Front End Pool.
This field is visible when the Interop Mode is set to Office 365 or Office 365 w/AD PBX.
This field can be NULL; if so, the address of the SIP Server will be used.
Specifies the Time-To-Live (TTL) value for inbound registration. Inbound registration values should be equal to or greater than this. Valid entry: Enter value in seconds. Default value: 3600.
This field is visible when the Agent Type is set as Access Mode.
Specifies any desired Active Directory attribute name in which the PBX number to be Registered is located; this field is dependent on how AD is configured. Default entry: =pager=.
This field is visible when Interop Mode is set as Office 365 w/AD PBX.
Controls the frequency (in days) for how often SIP queries Active Directory for all records with the specific AD attribute populated. Valid entry: 1 - 30 days.
This field is visible when Interop Mode is set as Office 365 w/AD PBX.
As an option, the AD Live Update feature forces the SBC to query AD directly to obtain updated records (rather than following the parameter set in the AD Update Frequency).
Specifies time of first AD query update in hh:mm:ss (24-hour format). Valid entry: hh (hour), mm (minute), ss (seconds).
This field is visible when Interop Mode is set as Office 365 w/AD PBX.
Specifies the Registrar Table attached to the Signaling Group for routing purpose and adding registration records.
Specifies the Time-To-Live (TTL) value for inbound registrations. Inbound registration values should be equal to or greater than this. This is configured in all registration scenarios.
Specifies the Time-To-Live (TTL) value for outbound registrations. This is configured only in the Forward modes of operation only.
Specifies the SIP Server Table to be used in the Signaling Group. The options in this field are derived from the configuration of SIP Server tables, see Creating and Modifying Entries in SIP Server Tables.
If a SIP Server Table is added which includes a server that has Stagger Registration enabled, Stagger Registration occurs. Also, if a SIP server table is removed which included a server that had Stagger Registration enabled, Stagger Un-registration occurs. For more information about Stagger Registration, see Creating and Modifying Entries in SIP Server Tables .
If you select an entry in the SIP Server table that is defined as DNS SRV, the Load Balancing field is not visible. See Load Balancing.
This field applies only when the SIP Server Table selected from the drop down list is IP/FQDN based and does not contain SRV servers (load balancing is not required if the SIP Server Table which contains a SRV server). See SIP Server Table.
Specifies the load balancing method used with this Signaling Group. Used only in the SIP Basic Call Mode.
Specifies the method that Call Control uses to allocate SIP channels.
Enables whether any CAC Profile updates received locally are transmitted to the SIP servers listed in this Signaling Group Configuration. Valid entry: Enable (Default, updates received locally are transmitted to SIP servers), or Disable (updates received locally are not transmitted to SIP servers) .
Indicates whether or not incoming request messages are challenged for security purposes. If this option is set to Enable, you must specify a realm and at least one entry in the Authorization Table.
Specifies the outbound proxy through which all SIP messages are sent. For in-depth configuration detail, see Outbound Proxy Configuration.
Specifies the port number for the outbound proxy, if one is configured. The port number must be in the range 1024 through 65535.
In the event of a No Channel/Circuit available release cause code, the specified cause code is sent to the relevant protocol module. For more information see the list of Cause Codes.
NOTE: This attribute relates only to Inbound calls on the Signaling Group where applied.
Specifies the interval of time, in seconds, after a call is initiated that the
Timer indicates the amount of time to wait after receiving a “100 Trying” for a call attempt (egress INVITE). When the timer expires the call will not proceed.
Option: 24 - 750 seconds.
Enables the QoE (Quality of Experience) reporting feature in the SBC. Valid options: Enabled (enables the feature) or Disabled (disables the feature). This field must be enabled for the QoE options to be available through the QoE Settings. See Configuring Quality of Experience (QoE) Settings
When this field is set to Disabled, only SIP Options (if configured) are used as a keep alive mechanism to mark the Signaling group as up or down
SIP Signaling Group - Media Information
Determines the streaming mode for audio, fax, and media transmission.
All three options are enabled by default.
Video/Application Stream Mode
Determines the streaming mode for audio, fax, and media transmission. This feature requires video license.
Both options are enabled by default.
Specifies the Media List used by this Signaling Group.
Specifies how ringback is played on a channel.
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Note: The Play Ring Back setting is activated only after the channel receives an ALERT or 180 Ringing. Issues with ringback and 183 Session Progress must be addressed using a Message Translation.
Click to see more information about Activating Play Ring Back.
Specifies the Tone Table used by this Signaling Group. Only visible if Always or Auto is specified for Play Ring Back.
Specifies whether a congestion tone is played when a 503 response with reason header Q.850 and cause code = 42 is received for outbound INVITE.
Options: Enable (congestion tone is played) or Disable (default; congestion tone is not played).
Specifies whether to send a SIP 183 response immediately after receiving an Invite message. The early 183 Session Progress with SDP provides the SRTP key that will be used to decrypt the transmit stream from SBC to the SIP peer. This setting is used to prevent the peer device (eg. Mediation server) from staying in the Trying state. This setting is required for Lync 2010/2013 Skype for Business interoperability.
Early 183 is applicable only when Audio/Fax Stream DSP Mode is enabled as the media mode.
The field enables Music on Hold at the SIP Signaling group level. Available options:
For detailed information about enabling Music On Hold as part of the Media configuration, see Configuring the Media System. For detailed information about uploading music files, see Uploading Music on Hold Files – SBC SWe Lite.
SIP Signaling Group - Mapping Tables
Specifies the SIP to Q.850 Override Table to be used for this Signaling Group.
Specifies the Q.850 To SIP Override Table to be used for this Signaling Group.
The default value is Enabled. If you disable the pass-thru peer SIP response, then the mapping tables will be applied to SIP-SIP calls.
SIP Signaling Group - SIP IP Details
Specifies the the logical port IP address over which SIP session are conducted. Only visible when NAT Traversal is set to None.
Each SIP-SG is configurable with the DSCP value to be used for signaling. This allows for improved quality of service in real time applications, such as conferencing and conversations.. The settings take effect for both client and server modes of SIP. The default value of 40 is the most common value used in the VOIP networks for signaling packets. The configured value should be chosen according to the QoS policies of the IP network in which the signaling packets travel.
Valid entry range: 0 to 63 (inclusive). Default value: 40.
Specifies whether or not the Signaling Group uses a third-party entity IP address inside SIP message to support network address translation (NAT). Only visible when NAT Traversal is set to Static NAT.
Symmetric NAT (port forwarding) is the only supported NAT type. This NAT configuration type means that packets received on a specific NAT server port are always forwarded to the same SBC port, for example, packets on the NAT public IP, port 5060 are forwarded to a private (SBC) IP, port 5060.
Specifies whether ICE support is enabled/disabled. Enable/disable is displayed only if the Interop Mode is set as Office 365 or Office 365 w/AD PBX.
When Interactive Connection Establishment (ICE) support is enabled, it takes precedence over all other media related NAT configuration.
If the selected Outbound NAT Traversal is Static NAT, you must enter the field NAT Public IP (Signaling/Media) appears.
Static NAT - Outbound
SIP Signaling Group - Inbound NAT Traversal
Enables and disables NAT Traversal detection for inbound SIP/RTP packets.
Specifies which SIP NAT Qualified Prefix Table to use in association with this SIP Signaling Group. The Qualified Prefixes Table is used to determine whether or not a particular subnet is behind a NAT device. If None is selected from the Qualified Prefixes Table drop down list, then all subnets are treated as if they were behind a NAT device. The options available from this drop down list are configured as part of NAT Qualified Prefixes.
Enables and disables Secure Media Latching for inbound RTP packets. When enabled, media latching occurs only if the RTP packet's IP is in the same subnet as the public IP seen by SIP signaling. When disabled, no IP address security checks are performed during RTP latching.
Specifies netmask used to compare the SIP Signaling IP and the RTP IP used for latching.
Enables and disables the time to live (TTL) functionality for inbound registrants from behind a NAT. If a client registers with an expires value greater than the value specified in the Registry Max. TTL field, the expiration is adjusted to the value specified in the Registrar Max TTL field.
Specifies a maximum time to live (TTL) for the SIP registration. The SBC uses this feature to determine that the client is still active, and aid in keeping bindings to remote NAT devices alive. If the SBC does not receive a request to re-register from the client before the expiry, the call and the registration are torn down.
Specifies how the Signaling Group will select the local IP.
Specifies the public IP of the NAT server visible from Internet. The NAT server's ports must be configured to allow SIP and RTP traffic, for example: port range 5060-5061 for SIP and 16000-17000 for RTP.
The IP address specified in this field must be publicly accessible.
SIP Signaling Group - Listen Ports
This section defines a listening port and protocol for the SIP Signaling Group
Specifies the port to listen for SIP messages.
Specifies the protocol with which this port can receive SIP messages.
If TLS is selected this specifies the TLS Profile this port will use for secure SIP messages.
SIP Signaling Group - Federated IP/FQDN
The Federated IP/FQDN feature acts as an access control by defining from which server a SIP Signaling Group will accept messages.
Specifies the IP Address (IPv4 or IPv6) or Fully Qualified Domain Name of a server from which the SBC will accept SIP messages. Federated IP allows IPv4, IPv6, or FQDN address format.
For IPv4:
For IPv6:
For FQDN:
For IPv4: Specifies the network address mask to apply against the specified server address.
For IPv6: Specifies the prefix to identify the subnet.
This option enables or disables the ability for the SBC to manipulate SIP messages using previously configured Message Tables.
Select from the drop down list: Enable (enables the feature) or Disable (disables the feature).
SIP Signaling Group - Inbound Message Manipulation
The rules in this table are used to manipulate inbound SIP messages in the Signaling Group. The Signaling Group will support a maximum of 10 Message Rule Tools allowed in the Signaling Group (inbound direction).
Up. Moves the message table entry up in the list.The rules are applied in the order the tables are listed.
Down. Moves the message table entry down in the list.The rules are applied in the order the tables are listed.
Add. Displays a drop down list of available message tables. Select an entry and click Apply.
Remove. Removes the message table entry from the list.
SIP Signaling Group - Outbound Message Manipulation
The rules in this table are used to manipulate outbound SIP messages in the Signaling Group. The Signaling Group will support a maximum of 10 Message Rule Tools allowed in the Signaling Group (outbound direction).
Up. Moves the message table entry up in the list. The rules are applied in the order the tables are listed.
Down. Moves the message table entry down in the list.The rules are applied in the order the tables are listed.
Add. Displays a drop down list of available Message Tables. Select an entry and click Apply.
Remove. Removes the message table entry from the list.