Line Number

Default = Auto-filled. Range = 1 to 249 (IP500 V2)/349 (Server Edition).

The line number must be unique. On IP500 V2 systems, line numbers 1 to 16 are reserved for internal hardware.

• Only one MS Teams line is supported, including for networked IP Office systems. For IP Office Server Edition and Select, the line should be configured on the primary server.

In Service

Default = Enabled

This option can be used to administratively disable the MS Teams Line. It does not reflect the dynamic state of the line.

Calling Number Verification

Default = Clear

These settings configure the SIP trunks use of STIR protocols for calling number verification. For more details, see SIP Calling Number Verification (STIR/SHAKEN).

• Incoming Calls Handling: Default = System.

  Sets the defaults for which calls are accepted by the system based on the authentication level of the call. This default can be overridden in the individual line configuration.

  • Allow All - Allow all calls regardless of authentication level. Note this can include calls with no authentication level.

  • Allow Validated - Only accept calls which are fully or semi-authenticated.

  • Allow Not Failed - Accept all calls expect those that specifically failed authentication. Note this can include calls with no authentication level.

Domain Name

Default = Blank.

An IP address or SIP domain name as required by the service provider.

Local Domain Name

Default = Blank.

An IP address or SIP domain name as required by the service provider.

When configured, the Local Domain Name value is used in the following:

• From and Contact headers

• PAI header, when the setting Line | SIP Line | Advanced | Use Domain for PAI is checked

• Diversion header

If both the  ITSP Domain Name and the Local Domain Name are configured, then Local Domain takes precedence.

Local Domain Name is not used in the Remote Party ID header.

Proxy Address

Default- Blank

Enter the proxy address to send the packet.

Example: ms-teams.com

Outgoing Group ID

Default = 97777

This value is not changeable. It can be used by short codes to route calls to the line.

Prefix

Default = Blank

This prefix is added to any source number received with incoming calls.

Max Calls

Default = 10

Sets the number of simultaneous calls allowed using this line.

URI Type

Default = SIP.

When SIP or SIP URI is selected, the SIP URI format is used (for example, name@example.com). This affects the From field of outgoing calls. The To field for outgoing calls always uses the format specified by the short codes used for outgoing call routing.

Recommendation: When SIP Secured URI is required, the URI Type should be set to SIP URI.

SIP URI can be used only when Layer 4 Protocol is set to TLS.

Media Connection Preservation

Default = Enabled.

When enabled, the system attempts to maintain established calls despite brief network failures. Call handling features are not available when a call is in a preserved state. When the Media Connection Preservation setting is enabled, it applies to Avaya H.323 phones that support connection preservation.

Location

Network Configuration

TLS connections support the following ciphers:

• TLS_RSA_WITH_AES_128_CBC_SHA

• TLS_RSA_WITH_AES_256_CBC_SHA

• TLS_DHE_RSA_WITH_AES_128_CBC_SHA

• TLS_DHE_RSA_WITH_AES_256_CBC_SHA

Layer 4 Protocol

Default = TCP.

Send Port

When Layer 4 Protocol is set to TLS, the default setting is 5061. When Layer 4 Protocol is set to TCP, the default setting is 5060.

Listen Port

When Network Configuration is set to TLS, the default setting is 5061. When Network Configuration is set to TCP, the default setting is 5060.

Use Network Topology Info

Default = None.

This field associates the line with the LAN interface System | LAN | Network Topology settings. It also applies the System | LAN | VoIP | DiffServ Settings to the outgoing traffic on the line. If None is selected, STUN lookup is not applied and routing is determined by the system's routing tables.

If no STUN server address is set for the interface, then the System | LAN | Network Topology | Binding Refresh Time is ignored by MS Teams Lines when calculating the periodic OPTIONS timing unless the Firewall/NAT Type is set to Open Internet.

Session Time (seconds)

Default = 1200. Range = 90 to 64800

This field specifies the session expiry time.  At the halfway point of the expiry time, a session refresh message is sent. Setting the Session Time (seconds) to On Demand disables the session timer.

Description

Default = Blank. Maximum 31 characters.

You can use this field to enter a description for the configuration entry. The description is not used elsewhere.