VoIP Extensions

DSX IP Keysets are available on-premise in a managed network or as remote IP extensions. DSX IP also supports compliant third-party SIP phones, soft phones, and ATAs.
  • Available in software versions 3.01 and higher.
  • Requires the installation of a VoIP Daughter Board (VOIPDB). The VOIPDB (P/N 1091044) provides 8 maximum VoIP gateway ports on DSX-40; 16 maximum on DSX-80/160. Available gateway ports may be restricted by licensing.
  • Up to 32 VoIP extensions are supported.
Setting up DSX Remote IP Keysets using NAT Traversal requires the purchase of a router for each remote site. Additionally, port 5060 at the system-side router must be forwarded to the system IP address. Depending on your experience level, this may require the services of an IT professional.
If setting up DSX Remote IP Keysets using VPN (Virtual Private Network), it requires the purchase of third-party VPN routers and the services of an IT professional.
Additional Feature Information
Installing the VoIPDB in DSX-80/160
Installing the VoIPDB in DSX-40
Programming for this Feature
VoIP Readiness Test Tools
QUICK START: DSX On-Premise IP Keyset
QUICK START: DSX Off-Premise IP Keyset using VPN
QUICK START: DSX Off-Premise IP Keyset using NAT Traversal
QUICK START: DSX IP Adapter (IPA)
QUICK START: Setting up the X-Lite Soft Phone
Setting up the System Options for an On-Premise DSX IP Keyset
DSX IP Keyset Admin Menu Setup Options
DSX IP Keyset CHECK Menu Options
VoIP Profile Defaults
DSX IP Telephone Firmware Update

Description

DSX IP Keysets

There are two available DSX IP Keysets: the 34-Button Backlit Display IP Telephone with Full-Duplex Speakerphone and the 34-Button Backlit Super Display IP Telephone with Full-Duplex Speakerphone.
34-Button Backlit Display IP Telephone with Full-Duplex Speakerphone (P/N 1090034)
The 34-Button Display IP Telephone features a large 3 line- by-24 character backlit alphanumeric display with 4 Interactive Soft Keys for intuitive feature access. It also provides 10 Personal Speed Dial keys, 24 programmable Feature Keys and 12 fixed function keys for streamlined operation. Additionally, this telephone offers a backlit keypad, a headset jack, and built-in Full-Duplex Speakerphone. Unique features include dual LEDs, built-in wall mounting, and an innovative two position angle adjustment.
The 34-Button Display IP Telephone has the same features and ease of use as the digital "TDM" model.
   
34-Button Backlit Super Display IP Telephone with Full-Duplex Speakerphone (P/N 1090035)
The Super Display IP Telephone features a large 9 line-by-24 character backlit alphanumeric display with 12 Interactive Soft Keys for intuitive feature access. It also provides 10 Personal Speed Dial keys, 24 programmable Feature Keys and 12 fixed function keys for streamlined operation. Additionally, this telephone offers a built-in Full-Duplex Speakerphone, a backlit keypad, and a headset jack. Unique features include dual LEDs, built-in wall mounting, and an innovative two position angle adjustment.
The 34-Button Super Display IP Telephone has the same features and ease of use as the digital "TDM" model.

VoIP Installation

You can install a DSX IP Keyset on-premise in a managed network or as a remote IP extension. The DSX IP Keyset supports common CODECs (G.711A, G.729, and G.722) which let you easily balance voice quality with available bandwidth.

Setting up DSX Remote IP Keysets using NAT Traversal requires the purchase of a router for each remote site. Additionally, port 5060 at the system-side router must be forwarded to the system IP address. Depending on your experience level, this may require the services of an IT professional.

If setting up DSX Remote IP Keysets using VPN (Virtual Private Network), it requires the purchase of third-party VPN routers and the services of an IT professional.

For a complete index of the available VoIP resources, click VoIP Extensions in the menu bar at the top of this page.

The DSX IP Keyset uses a single CAT5 Ethernet cable to the desktop which connects to the compact, unobtrusive DSX IP Adaptor. The adaptor connects to the LAN, the IP keyset, and a PC, as well as provide the power required by the telephone. A separate power supply and cable are not required. If the switch to which the keyset is connected is Power Over Ethernet (PoE 802.3af) compliant, the DSX IP Adaptor power supply is not required because telephone power can be provided by the switch.

DSX IP Adaptor (P/N 1091045)


Third Party SIP Extensions

Third party SIP extensions compliant with SIP VoIP RFC 3261 can be installed on-site or remotely. The SIP extension should provide all the features available at a single line telephone unless dial pad keys are "hijacked" by the SIP extension. For example, if a SIP extension uses * as a setup command, it won't be able to use Directed Call Pickup.

Emergency (911) Calls and Remote IP Extensions

When a remote IP extension user dials 911, the call routes to the 911 service for the location in which the main system is installed. The emergency call does not route to the 911 service for the remote location.

Common VoIP Terms

Term Description
NAT Traversal Network Address Translation Traversal
  • Allows a Remote IP Keyset behind an inexpensive off-the-shelf router to connect to the DSX over the public internet. Without NAT Traversal, the remote site would have to implement VPN.
SOHO Router Small Office Home Office Router
  • Usually refers to an inexpensive off-the-shelf NAT router typically found in a small office or home. Can be wired or wireless. The management interface provides basic features like DHCP setup, port forwarding, and basic security.
VPN Virtual Private Network
  • VPN sets up a private, secure, nailed-up connection (called a tunnel) between a Remote IP Keyset and the DSX system. This effectively puts the remote keyset and the DSX system on the same network. This is an alternative to NAT Traversal and requires network administration knowledge to set up.

Conditions and Defaults

Conditions


  • You should always check the readiness of the LAN or remote site before installing VoIP. See VoIP Readiness Test Tools for more.
  • In software versions prior to 3.20, the remote site router had to be either a Linksys WRT54GL or WRT160NL. In subsequent software versions, NAT Traversal is available with any router.

Default Setting


  • Station ports 101-128 (extensions 401-428) are assigned as IP station ports.
  • No passwords are defined for IP extensions.
  • VoIP Profile 1 is preset for on-premise (LAN) connections. This is the default assignment for all IP station ports.
  • VoIP Profile 2 is preset for remote connections.

Release Notes (System)

Busy Lamp Field Status for Third-Party SIP Telephones

[3.00.35] In prior versions, a keyset's Hotline or Call Coverage key BLF was not fully functional when the key was assigned to a third-party SIP extension. For example, there was no BLF indication for any call placed from the third-party SIP extension. Additionally, if a call was ringing the SIP extension, the BLF coverage would continue after the SIP extension user answered. These issues are now corrected.

Reference: None

Double-Digit Dialing at SIP Extensions

[3.05] An error is corrected that could cause calls dialed from a 3rd-party SIP telephone to output double-digits on CO lines if the SIP telephone had audio cut-through to the outside line prior to dialing. This could happen, for example, if the user dialed 9, listened for outside dial tone, and then dialed the rest of the number.

This double-digit dialing problem would only occur if the SIP telephone was dialing digits in-band or was using RFC2833 . The system would re-generate digits that were already presented to the outside line in-band.

Reference: None

Echo Canceller Inadvertently Disabled

[3.00.32] The Echo Canceller was inadvertently disabled in version 3.00.30. It is now fully functional.

Reference: None

Extension Number Swap Causes One-Way

[3.01] A problem is corrected where swapping two IP extension numbers in programming would cause a one-way audio path..

Reference: A090701004

Internal VOIPDB Gateway Address Changed

[3.00.35] The IP address of the internal VOIPDB gateway is changed from 10.0.0.1 to 10.254.254.1. This makes the DSX VoIP more compatible with 10.0.0.xx networks.

Reference: None

IP Keyset Stuck in Connecting Mode

[3.01] A correction is made in this version to prevent an IP keyset from becoming stuck in the Connecting to DSX state. The keyset will now automatically de-register so the connection process can begin again.

Reference: A090615002

IP Performance Degrades Under Load

[3.01] This software version corrects a memory utilization problem that would cause IP performance to continually degrade under heavy traffic. The system would have to be reset to clear the problem.

Reference: A090609006

IP Port Registration and Licensing

[3.00.35] Up to 32 IP telephones can be connected to the system, and the number that can be on a call simultaneously is set by the IP port licensing. In prior versions, the licensing also limited the number of IP telephones that could be connected.

Reference: None

Lockup Under Heavy Traffic

[3.00.35] Improvements have been made to the system's IP traffic handling to minimize the likelihood of lockups under heavy IP traffic situations.

Reference: A090529005

MAC Address Incorrect After Startup

[3.00.32] An issue is corrected that could cause IP Keysets to report the MAC address of the VoIPDB after startup or reset. This could potentially cause no audio.

Reference: A090508008

MAC Address Not Updated After Swap

[3.00.32] If an IP keyset is replaced at the same extension, the MAC address reported to the system matches the new keyset. In prior versions, the old address would be retained until reboot potentially causing no audio.

Reference: A090512001

Multicast Option Added - Not Implemented

[3.00.32] This option is added in this release but is currently not used.

Reference: None

One-Way Audio on IP After Reboot

[3.01] A problem is corrected where IP telephones would get one-way audio if DHCP was enabled and the system was reset.

Reference: A090618001

Pressing SPEAKER During Connect Resets IP Telephone

[3.00.35] In prior releases, pressing SPEAKER while the IP keyset displays Connecting will cause the keyset to continually reset. This is corrected.

Reference: A090611008

RTP Range End Narrowed

[3.00.32] The RTP port range is the setting of 1801-04: RTP Range Start plus 64. This accommodates the 32 RTP ports and 32 RTCP ports required by the system's 32 maximum VoIP ports. In prior versions, the upper end of the RTP range was set in 1801-05: RTP Range End and was 65536 by default.

Reference: A090513012

Selecting G.723 Codec Resets System (3.05)

[3.05] A problem is corrected which would cause the system's VoIP processes to crash if the G.723 Codec was selected in 1812: Codec Type for the active VoIP Profile. Note that G.723 only is only supported by some 3rd-party SIP telephones. It is not a valid Codec type for DSX IP keysets.

Reference: None

SIP Extensions Don't Advance Past First Codec

[3.05] In prior version 3 releases, a 3rd-party SIP telephone could not negotiate past the first Codec in the 1812: Codec Type list. This is corrected.

Reference: None

SIP Server Setup Using URL Available

[3.02] When using the IP keyset Admin to enter the SIP server address, you can enter either the IP address or the SIP server's URL (if any). Although more useful when connecting to the keyset Admin from your PC browser, URL entry is also available from the telephone.
  • IP/URL switches between the IP address and URL modes.
  • While in the URL mode:
    • * switches between upper case, lower case, and numeric entry.
    • 1 in the text entry mode enters periods and other special characters.
    • VOLUME keys scroll left and right.
    • DEL deletes the character to the left of the cursor.

Reference: None

Telephone Programming Interface Improved for 1812: Codecs

[3.00.32] The telephone programming interface for 1812: Codecs is improved. After selecting a profile, pressing Hold now moves through the options for the selected profile.

Reference: A090318002

Third-Party SIP Telephones Forced to Reregister

[3.05] The system forces third-party SIP telephones to reregister every 180 seconds. This minimizes the possibility that third-party SIP telephones will deregister and go out of service.

Reference: None

VoIP Profile 4 Disables VoIP

[3.01] A problem is corrected where selecting VoIP Profile 4 would cause the system's VoIP processes to fail.

Reference: A090623004

Release Notes (Admin)

VoIP Profile Options Not Changed

[3.00T] In prior versions, updating System: VoIP: Profile and Stations: Config: VoIP (2106): Profile did not take effect in the system. This is corrected.

Reference: None

Release Notes (IP Telephone Firmware)

Admin Menu Enhancements

[1.0.5.0] IP Telephone Firmware 1.0.5.0 provides the following enhancements in the Admin Menu:
  • 2:SIP Settings: 1:SIP User: 4:Backup Logon is removed since it is not used.
  • 2:SIP Settings: 2:SIP Server: 1:Server Address provides entry for a single SIP Server (i.e., system IP address). There were two SIP Server entries in prior versions, but only the first entry was used.
  • 2:SIP Settings: 2:SIP Server: 2:Server Port provides entry for a single SIP Server Port (i.e., 5060 by default). There were two SIP Port entries in prior versions, but only the first entry was used.
  • 2:SIP Settings: 3:SIP Local Port provides the IP telephone's SIP port (i.e., 5060 by default). You can change this option if required.
  • 2:SIP Settings: 4:RTP Local Port provides the IP telephone's RTP port (i.e., 3462 by default). You can change this option if required.
  • The method for setting a new password for the IP telephone is changed in 4:Security: 2:Admin Password. You will now make three entries: Old Pswd (the old password), New Pswd (the new password), and Re-Enter (reenter the new password for confirmation).

Reference: None

Browser Interface Not Functioning

[1.0.5.0] In firmware version 1.0.3.0, the browser interface for setting the IP telephone options was not available. This is corrected in version 1.0.5.0.

Reference: A090601001

CHECK Menu Enhancements

[1.0.5.0] IP Telephone Firmware 1.0.5.0 provides the following enhancements in the CHECK Menu:
  • 2.System Information: 2: SIP Settings: shows a single connected SIP server. In prior releases, the 2nd SIP Server option had no meaning.
  • 2.System Information: 2: SIP Settings: shows a single connected SIP server port. In prior releases, the 2nd SIP Server option had no meaning.

Reference: None

Other Related Features

Features


  • DSX IP Keysets have the same feature set as on-premise digital "TDM" keysets.

IntraMail Features


  • DSX IP Keysets have the same feature set as on-premise digital "TDM" keysets.