In this section:

Overview

Use this object to configure SIP signaling ports for a specified zone. For additional routing details, refer to Routing Mechanisms page.

A SIP Signaling Port is a logical address permanently bound to a specific zone and is used to send and receive SIP call signaling packets. A SIP Signaling Port is capable of multiple transports such as UDP, SCTP, TCP and TLS/TCP.

SBC Core supports up to 16 SIP Signaling Ports per zone. These SIP Signaling Ports can use the same IP address, but each must have its own unique UDP/TCP port. In the example below, three SIP Signaling Ports are created using the same IP address but each with a unique UPD port.

  • SIP Signaling Port 1: 100.110.120.130 port 5060 
  • SIP Signaling Port 2: 100.110.120.130 port 5070
  • SIP Signaling Port 3: 100.110.120.130 port 5080

A SIP Signaling Port can contain an IPv4 address, an IPv6 address or both. However, all SIP Signaling Ports within a particular zone must use the same address types as shown in below examples.

Example 1:

  • SIP signaling port 1 - IPv4 address
  • SIP signaling port 2 - IPv4 address

Example 2:

  • SIP signaling port 1 - IPv6 address
  • SIP signaling port 2 - IPv6 address

Example 3:

  • SIP signaling port 1 - IPv4 / IPv6 addresses
  • SIP signaling port 2 - IPv4 / IPv6 addresses

A SIP Signaling Port must reference one IP Interface Group signifying that signaling associated with that port is restricted to IP Interfaces in that group. Only reference IP Interface Groups within the same Address Context.


Note

The  SBC 7000 system supports creating IP Interface Groups containing sets of IP interfaces that are not "processor friendly" (i.e. carried on physical Ethernet ports served by separate processors). However, restrictions exist regarding the usage of such Interface Groups.

(This ability does not apply to the SBC 5400, which has only two physical media ports. You may configure the IP interfaces from the two physical ports within the same IP Interface Groups without restrictions.)

For complete details, refer to Configuring IP Interface Groups and Interfaces.


Note
Ribbon recommends using the highest TLS version supported by both the SBC and the peer equipment.


Note

If a zone's sipSigPort is configured for transportProtocolsAllowed = sip-tls-tcp, the SBC increments the configured portNumber by 1 and uses it as the new port number for SIP over TLS signaling. The SBC then opens a TCP socket for SIP over TLS for the new TCP port number.

Example: When sipSigPort is configured with a portNumber of 5060 and transportProtocolsAllowed = sip-tls-tcp, the SBC listens on TCP port 5061 for SIP over TLS.

To View SIP Sig Port

On the SBC main screen, choose a path:

  • All > Address Context > Zone > SIP Sign Port
  • Configuration > System Provisioning > Category: Base Provisioning > Signaling Ports > SIP Sig Port
  • Configuration > System Provisioning > Category: SIP Carrier Peering > SIP Sig Port

The SIP Sig Port List pane displays.


The SIP Sig Port can be checked for each Address Context or for each Zone or for all the Address Contexts and Zones created. Use the drop-down box to select the desired Address Context and Zone.

To Edit SIP Sig Port

To edit any of the SIP Sig Ports in the list, click the radio button next to the specific SIP Sig Port name. The Edit Selected SIP Sig Port window is displayed.

Make the required changes and click Save.


To Create SIP Sig Port

To create a new SIP Sig Port, click + New SIP Sig Port in the SIP Sig Port List panel.

The Create New SIP Sig Port window is displayed.


Parameter Descriptions

Parameter

Description

Index

A unique profile identifier.

Mode

The operational state of the SIP Sig Port.

  • In Service (default)
  • Out of Service

State

The administrative state of the SIP Signaling Port.

  • Disabled (default)
  • Enabled

IP Interface Group Name

Select from the drop-down list.

IP Address V4

The IPv4 address in dotted decimal form (for example 10.11.12.134).

IP Address V6

The IPv6 address in hexadecimal/colon form (for example, fd00:21:445:128::7880 64).

Port Number

The UDP/TCP port number of SIP Signaling Port, which has a default of 5060.

Recorder

Administrative state of the SIP Signaling Recorder Port.

  • Disabled (default)
  • Enabled

NOTE: Ensure that the Recorder flag is disabled when SIPrec flag is enabled.

SIPrec

The administrative state of the SIP Signaling Recorder Port. Enable this flag to use the port for recording using the SIPREC Protocol.

  • Disabled (default)
  • Enabled

When the SIPrec flag is enabled, ensure the Recorder flag is disabled.

NOTE: The SIPREC feature is controlled by a system-wide SBC license (SBC-SIPREC). If the license is not available, any SIPREC recording returned by a PSX is ignored.

TCP Connect Timeout

This parameter indicates the maximum time, in seconds, allowed for SBC to establish an outbound TCP connection.

NOTE: This application level configuration has no impact on any IP layer re-transmission of SYN.

DSCP Value

DSCP value (0-63) for packets from this SIP Signaling Port.

NOTE: This DSCP value marks non-HPC calls. Configure the DSCP value in the HPC profile configuration to mark HPC calls. The DSCP value configured in the Hpc Call Profile for HPC calls with UDP as transport can override the DSCP value configured in the SIP signaling port.

TLS Profile Name

The name assigned to this Transport Layer Security (TLS) profile. The value range is 1-23 characters.

Transport Protocols Allowed

The transport protocols allowed on this signaling port as follows:

  • sip-udp
  • sip-tcp
  • sip-tls-tcp
  • sip-sctp

NOTE: The SBC supports only UDP towards the recording server.


To learn more about the various methods of controlling transport protocols for SIP signaling and how these work together, refer to Controlling SBC Core Transport Protocols for SIP Signaling.


SCTP Profile Name

The name of the SCTP profile used for this SIP Signaling Port.

TCP Keepalive Time

The number of seconds a TCP connection remains idle before TCP Keep-alive probes are sent out. A value of "0" disables this parameter. The value ranges from 0, or 60 to 7200 seconds, and the default value is 0. 

NOTE: Always configure TCP Keepalive Time with a higher value than the TCP Keepalive Interval.

TCP Keepalive IntervalThe number of seconds between TCP Keep-alive probes. The value ranges from 60 to 120 seconds and the default value is 60. 
TCP Keepalive ProbesThe maximum number of TCP Keep-alive probes to send until SBC decides that the connection is broken. The value ranges from 1 to 20 and the default value is 2. 
Mask Portfor Rcb

This flag fetches the RCB value for a user. When this flag is enabled, the RCB value is fetched using only the source IP address and not the source port for generating the hashKey.

  • Disabled (default)
  • Enabled

NOTE: Disable the Mask IP Addressfor Rcb flag in order to use the Mask Portfor Rcb flag. You cannot enable both flags at the same time.

Mask IP Addressfor Rcb

This flag fetches the RCB value for a user. When this flag is enabled, the RCB value is fetched using only the usingsource port and not the source IP address for generating hashKey.

  • Disabled (default)
  • Enabled

NOTE: Disable the Mask Portfor Rcb flag in order to use the Mask IP Addressfor Rcb flag. You cannot enable both flags at the same time.

Enforce AOR Match

Enable this flag to enforce AOR matching for messages from registered users.

  • Disabled (default)
  • Enabled
Action

Use this flag to specify a clearing action when the SIP Signaling Port goes out-of-service (OOS). Calls can be forcefully cleared or allowed to dry up in out-of-service mode.


  • Dryup – SBC starts the Dry Up Timeout timer indicating the time in minutes the calls are allowed to complete. Once the timer expires, ongoing calls are torn down gracefully.
  • Force – (default) Ongoing calls on the given signaling port are cleared immediately.

NOTE: If a SIP signaling port is put out of service when Action = Dryup, always let the Dry Up Timeout timer expire before putting the SIP signaling port back into service. Otherwise, the SIP signaling port may not come up properly.

Modified: for 12.1.3

Dry Up Timeout

Use this parameter to specify the time (in minutes) until which existing calls are allowed to complete in out-of-service mode with dry up action. The value has a range of 1-1440 and a default of 60.

When the Action flag is set to Dryup and SIP Sig Port goes OOS, SBC starts a dry up timer for the configured duration. The SBC exhibits the following behavior when Dryup is enabled:

  • Calls: All in-dialog messages are allowed, new INVITE messages are rejected with 503.
  • Registrations: All refresh REGISTER and de-REGISTER messages are allowed, new REGISTER messages are rejected with 503.
  • Out-Of-Dialog (OOD) relay messages: All new OOD messages are rejected with 503. However, in-dialog messages with-in REFER and SUBSCRIBE dialogs are allowed.

Once the dry up timer expires, the SBC tears down ongoing calls and all ongoing SIP Registrations and non-call related dialogs are cleared internally. The SIP Signaling Port is then moved to OOS state where no SIP messages are admitted.

NOTE: The Dry Up Timeout flag is displayed when the Action flag is set to "Dryup". The Dry Up Timeout flag is configurable regardless of the setting of the SIP Signaling Port state.

TCP User Timeout

The maximum number of seconds that transmitted data remains unacknowledged before TCP forcibly closes the corresponding connection.

Enter 0 (default) or a value from 10-3600.

SIP TCP Connection Aging State
Enable this flag to retain the present behavior. Connections are added to the TCP aging list and are closed if they are idle for more than an hour. When disabled, TCP connections are not added to the aging list and are maintained even if they are idle for more than an hour. Connections will live until intentionally closed or keepalive failures kick in.
  • Disabled
  • Enabled (default)
Note

If recorder is enabled, the SBC does not handle the following requests. To overcome this, configure a separate SIP Signaling Port towards the recording server (with recorder enabled).

  • OPTIONS
  • NOTIFY
  • SUBSCRIBE
  • MESSAGE
  • PUBLISH
  • INFO
  • REFER
  • REGISTER

To Copy SIP Sig Port

To copy any of the created SIP Sig Port and to make any minor changes, click the radio button next to the specific SIP Sig Port to highlight the row

Click Copy SIP Sig Port on the SIP Sig Port List panel. The Copy Selected SIP Sig Port window is displayed including the editable fields.

Make the required changes to the required fields and click Save to save the changes. The copied SIP Sig Port is displayed at the bottom of the original SIP Sig Port in the SIP Sig Port List panel.

To Delete SIP Sig Port

To delete any of the created SIP Sig Port, click the radio button next to the specific SIP Sig Port.

Click Delete at the end of the highlighted row. A delete confirmation message appears seeking your decision.

Click Yes to remove the specific SIP Sig Port from the list.