VoIP

The Extron DMP Plus Series V models function as generic SIP 2.0 devices (RFC 3261)
As a generic device, it supports the following features:

• Outbound Calls
• Inbound Calls
• In call DTMF - In-band and out-of-band
• Call Hold
• Auto Answer
• Early Offer, Early Media, or Early Media Timing
  • SDP or media is included in Invite Message
• Delayed Offer
  • Invite Message that does not include SDP or Media

The VoIP interface does not support advanced call service features

• Examples: Call Park, Presence Status, or Instant Messaging, etc.

Please refer to Section 2 of your call server's VoIP Configuration Guide, available under the Downloads tab, for specific details.

An Extron DMP Plus Series V model can use LAN 1 (default) or LAN 2, configurable through the VoIP configuration webpage.

LAN 1 and LAN 2 on the DMP both have the same capabilities for connecting, configuring, and controlling the hardware.
If the call manager intends to register the DMP Plus VoIP interface and the control system reside on the same IP subnet,
only a single LAN connection is needed.

For best performance, it is recommended that LAN 1 be used to for VoIP traffic.

No, an Extron DMP Plus Series V model displays SIP transactions through a log on the VoIP configuration webpage, which can be exported to a text format file.

• G.711u
• G.711a
• G.722
• G.722.1 24/32
• G.722.1c 24/32/48
• G.726 16/24/32/40
• G.726aal2 16/24/32/40
• G.729A

Yes, Extron supports customizable codec priority per line.

The following items are required:

• Call server proxy address
• Port number for the proxy address
  Default unencrypted is 5060, or 5061 for encrypted
• Extension number (User ID)
• Optional
  • Authorization Name (Auth Name)
  • Password

Line

• An extension or phone number

Appearance

• Transmit / Receive audio stream (RTP)
• A Line needs at least one Appearance
• For each remote caller on a line beyond the first caller, an additional appearance is required

The Extron DMP Plus Series V models support up to eight lines per unit or eight appearances per line, as long as the call server supports multiple appearances on one line.

Please refer to the appropriate VoIP Configuration Guide, located on the Downloads tab above.

Extron supports numeric dialing (E.164) and alpha-numeric dialing.

Example:
Numeric dialing: 1234@callserver.local
Alpha-numeric dialing: john.smith1234@callserver.local

No, the VoIP interface does not support advanced call service features

• Examples: Call Park, Presence Status, or Instant Messaging, etc.

Yes, Extron supports various modes of TLS encryption through the use of PEM formatted certificates.

Features include:

• Self-generated certificates and keys
• Auto signing of certificates
• Support for Certificate Authority (CA)

When TLS is used only Line 1 can be used on the DMP Plus VoIP Interface

Yes, Extron supports SRTP encryption via AES CTR.
When TLS is used only Line 1 can be used on the DMP Plus VoIP Interface

Yes, Extron supports QoS on Layer 3 (DSCP) and Layer 2 (TOS/PCP), both of which can be configured through the VoIP configuration webpage.

Yes, the Extron DMP Plus Series V models have the ability to tag network frames using the 802.11Q protocol. One VLAN is supported on either LAN 1 or LAN 2.

Yes, Extron supports LLDP-MED with the following parameters:

• VLAN ID
• Layer 2 and Layer 3 QoS tags
• Civic Location (unit locations)
• Inventory

Yes, Extron supports the following NAT Traversal methods:

• STUN
• TURN
• ICE

Extron supports both in-band and out-of-band signaling for DTMF. The following settings can be adjusted per line:

• In-band
• Out-of-band - SIP INFO
• Out-of-band - SIP INFO Relay
• Out-of-band - RFC 2833

No, each line may be registered to a separate call server.

Yes, each line may be registered to a primary and secondary call server.

Extron default RTP port range is from 50000 to 50999.

This range can be adjusted, if required, via the VoIP configuration webpage. For more details, refer to the Extron VoIP Configuration Guides.

Yes, Extron does support 802.1x port-based Network Access Control on the DMP Plus Series VoIP interface.

802.1X Authentication requires firmware 1.08.0002 or higher and Extron ToolBelt Software.