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Configuring SIP settings

A SIP call will select the audio and video codecs to use from the set of those both those allowed on the Settings > Connections page and supported by SIP (go to Settings > SIP ), unless the call is with an endpoint configured with a Custom codec (refer to Configuring SIP endpoints for more information).

Refer to this table for assistance configuring the SIP settings. After making any configuration changes, click Apply changes.

 

Field Field description Usage tips
SIP registrar settings
SIP registrar usage

Enables the IP VCR to use a SIP registrar for registrations of numeric identifiers for its recordings.

When set to Disabled, then no SIP registrar registrations are attempted (and existing registrations are torn down), regardless of other settings.

When set to Enabled, registrations with the registrar are attempted, and calls can be made through the registrar.

SIP registrar domain

Identifies the network address of the SIP registrar to which IP VCR registrations should be made.

This can be specified either as a host name or as an IP address. This field will have no effect if SIP registration settings is set to No registration.

SIP registrar type

Choose between:

  • Standard SIP: for non-Microsoft SIP registrars
  • Microsoft OCS/LCS: for Microsoft SIP registrars

Your choice is dependent on the type of SIP registrar you are using.

This field will have no effect if SIP registration settings is set to No registration.

Username

The login name for the IP VCR on the SIP registrar.

You need to configure the SIP registrar with details of the devices that will register with it and create a login for each device.

If you are using Microsoft OCS or LCS, you need to enter the full URI (for example, MCU@example.com).

Password

The password for the IP VCR on the SIP registrar.

You need to configure the SIP registrar with details of the devices that will register with it and create a login for each device. The password configured on this page needs to match the password in the SIP registrar.

Note that this username will be used anywhere where one is required in a SIP call; for example, it will be used where authentication is required with a SIP server where no registrar is used.

ID registration for recordings

Allows recordings to be registered to the SIP registrar.

If selected, you can choose whether to register a particular recording by opening its recording information page and selecting SIP registrar in the Numeric ID registration field.

SIP call settings
SIP proxy address

Identifies the network address of the SIP proxy.

If set, the proxy is used for all SIP calls, whether through a registrar or not.

Maximum bit rate from Microsoft OCS/LCS clients

Select a maximum bit rate to use from Microsoft OCS/LCS clients.

Microsoft OCS/LCS clients will try to use the maximum bit rate that the IP VCR advertises during the initial call setup. In most scenarios, you will not want OCS/LCS clients to use the Default bandwidth from IP VCR that is configured on the Settings > Conferences page (Configuring global conference settings). Use this setting to select an appropriate bit rate for Microsoft OCS/LCS clients.

<limit disabled> will cause the IP VCR to advertise the Default bandwidth from IP VCR.

Outgoing transport

Identifies the protocol to be used for call control messages for outgoing call connections.

If your SIP devices use TCP, select TCP as the outgoing transport. If your SIP devices use UDP, select UDP as the outgoing transport.

The IP VCR can accept connections on TCP, UDP, and TLS providing those services are enabled on the Network > Services page (Configuring network services).

Use local certificate for outgoing connections and registrations

Select this option to force the IP VCR to present its local certificate when registering with the SIP registrar and when making outgoing TLS calls.

Often, the SIP registrar will not require the local certificate from the IP VCR. Only select this option if your environment dictates that the SIP registrar must receive the local certificate.

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