DMP 128 Plus C V and DMP 128 Plus C V AT models include up to eight VoIP lines, with wideband codec support, that can be configured as individual extensions or with multiple call appearance channels to support local conferencing applications. Compatible with select VoIP systems, any V model of the DMP 128 Plus Series can be used for a single VoIP line or as a VoIP farm for up to eight rooms.
Network-specific VoIP configuration such as call server registration, Virtual LAN (VLAN) provisioning, Quality of Service (QoS), and traversal of Network Address Translation (NAT) is managed through a dedicated VoIP configuration webpage, where SIP transaction log and advanced diagnostic tools are also available. This segregation of VoIP configuration allows IT and network administrators to effectively manage the VoIP aspect of DMP 128 Plus devices without the need to develop a detailed knowledge of audio DSP configuration. The inclusion of LLDP-MED technology allows the DMP 128 Plus to automatically obtain and apply advanced network configurations when connected to a compliant VoIP infrastructure.
The DMP 128 Plus C V and DMP 128 Plus C V AT models are compatible with select VoIP systems* and can be used for a single VoIP line or as a VoIP farm for up to eight rooms.
* Refer to the Compatibility tab for supported systems.
It is important to note that specific systems have been tested and their compatibility noted below. While systems that meet Session Initiation Protocol RFC 3261 – SIP 2.0 requirements may operate without problems, Extron can only provide support for the systems below.
An Extron Compatible Partner VoIP system has been extensively tested and documented in coordination with the solution partner.
An Extron Certified VoIP system has been extensively tested and documented internally.
An Extron VoIP Compatible system has been informally tested by Extron or third parties.
Examples: Call Park, Presence Status, or Instant Messaging, etc.
Please refer to Section 5 (Avaya) or Section 2 (all others) of your call server's VoIP Configuration Guide, available under the Downloads tab, for specific details.
Transaction Log SIP transactions viewable in VoIP configuration webpage. Exports in text file format.
What type of VoIP interface does Extron support?
Please refer to Section 2 of your call server's VoIP Configuration Guide, available under the Downloads tab, for specific details.
Which LAN port can be used for VoIP?
An Extron DMP 128 Plus V model can use LAN 1 (default) or LAN 2, configurable through the VoIP configuration webpage.
Do I need to use network capture software to examine SIP transactions?
No, an Extron DMP 128 Plus V model displays SIP transactions through a log on the VoIP configuration webpage, which can be exported to a text format file.
Which audio codecs does Extron support?
Does Extron support codec priority per line?
Yes, Extron supports customizable codec priority per line.
What information is required to register a line to a call server?
What is the difference between a Line and an Appearance?
Does Extron support 3-way calling?
The Extron DMP 128 Plus 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.
What type of dialing does Extron support?
Extron supports numeric dialing (E.164) and alpha-numeric dialing.
Does Extron support Presence for device awareness?
Does Extron support call signaling encryption?
Yes, Extron supports various modes of TLS encryption through the use of PEM formatted certificates.
Does Extron support call traffic encryption?
Yes, Extron supports SRTP encryption via AES CTR.
Does the Extron VoIP interface support QoS?
Yes, Extron supports QoS on Layer 3 (DSCP) and Layer 2 (TOS/PCP), both of which can be configured through the VoIP configuration webpage.
Does the Extron VoIP interface support VLAN tagging (802.11Q)?
Yes, the Extron DMP 128 Plus 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.
Does Extron support NAT Traversal?
Does Extron support in-band or out-of-band DTMF signaling?
Do all lines need to be registered to the same call server?
No, each line may be registered to a separate call server.
Can a secondary call server be configured for redundancy?
Yes, each line may be registered to a primary and secondary call server.
Which RTP ports are used on the Extron VoIP interface?
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.
Does Extron support 802.1x authentication?
At the current time Extron does not support 802.1x port-based Network Access Control on the DMP 128 Plus VoIP interface.