DGW Release Notes v2.0.41.762

In case of Hosted SIP Services failure, the new Survivability Proxy service (SipProxy) ensures internal call control for registered IP phones and other connected equipments while redirecting external calls to the PSTN, if available.

This service is available on the C7, G7, S7, Sentinel 100, and Sentinel 400 platforms. A field-installable licence is required to activate this service.

The support of RFC4730 Event Package for Key Press Stimulus (KPML) when acting as a user agent server was added. The feature is disabled by default and can be activated via the SipEp.UasKpmlSupport parameter.

More space was reserved for the jitter buffer allowing the Sentinel 400, the Sentinel 100, the Mediatrix C7, the Mediatrix S7, and the Mediatrix G7 to support a jitter buffer value up to 900 ms. A new mode of packet processing optimised for large Jitter buffer sizes was also added.

Argentina country tones are now available.

• Sentinel 400, Sentinel 100, C7, S7, and G7 platforms now support maximum jitter buffer values up to 900 ms.
• It is now possible to set the nominal jitter buffer value for custom voice and voice band jitter buffer configurations.
• Using a value of 0 for the nominal jitter value is interpreted as the middlepoint between the minimal and maximal jitter buffer values.
• The Mipt.InteropPacketReceptionMode parameter was added, for which the default value is Mode1. With this option, processing of unsupported inbound packetisation times was removed to increase quality (ex: 10-100 ms with increments of 1 ms for the G711). Legacy mode is still present as Mode0, but is not enabled by default.

IN-13057

In a 200 OK for INVITE-Replaces that transfers an outgoing call; the Contact header will contain the Caller URI.

IN-13057

The Referred-by header copied from the REFER to the INVITE now contains the URI and the parameters.

IN-12549

Add new value for the parameter SipEP.InteropAllowAudioAndImageNegotiation to allow the customers to disable image port in answer. The SipEP.InteropAllowAudioAndImageNegotiation parameter now supports the following new enum values to allow the customers to disable image port in an answer.

• DisableOffer: Outgoing offers never include image and audio simultaneously. Incoming offers with audio and image media with a non-zero port are answered with audio and image media, but considered as offering only audio.
• DisableAll: Outgoing offers never include image and audio simultaneously. Incoming offers with audio and image media with a non-zero port are answered with audio and image media but the image media will be disabled. If it has the T.38 codec enabled and wishes to send or receive fax, a new re-INVITE will be sent to negotiate image port. RG Flags

IN-12721

New SipEp.InteropActivateEarlyMediaOnProvisionalResponseAck interop parameter:

• Disabled: During the SIP call establishment, the first RTP packet is triggered by the transmission of the "SIP 183 Progress" (Default behavior)
• Enabled and all conditions are encountered: During the SIP call establishment, the first RTP packet is triggered by the transmission of the "200 OK" of the PRACK of the "SIP 183 Progress".

A new message "There is no packet capture in progress." has been added.

IN-12842

New TLS version negotiation mechanism

The former "1000-Packet capture started to destination %1$s." notification now reads as "1000-Packet capture started."

IN-13222

Out of order RTP Events now have the correct sequence numbers.

IN-13057

In a 200 OK for INVITE-Replaces that transfers an outgoing call; the Contact header contained the URI of the first transferor. This Contact header will now contain the Caller URI.

IN-13057

The Referred-by header copied from the REFER to the INVITE contained only the URI and did not contain the parameters. Now all parameters are copied with the URI in the Referred-by header.

Option 66 and Option 67 provisioning configuration table is no longer lost when the firmware is upgraded to DGW 2.0.41.

Upgrading to loads DGW 2.0.39 and 2.0.40 will not be fixed.

When multiple registrations were received at the same time, the expiration value could get corrupted and show a value in the past. The Sbc unit can now properly handle multiple registrations at the same time.

When converting INFO towards AVT on the SBC unit, the *(star) and #(pound) keys are no longer sent as 0.

IN-12721

In the Sbc service, outbound rules were only applied to certain Sip traffic. Both inbound and outbound rules are now applied to all Sip traffic.

When the Sbc service was using a wrong certificate to validate a connection with a registrar, the unit would sometimes get unresponsive forcing the user to restart the unit. When the Sbc service uses a wrong certificate, the connection fails, but the unit no longer needs to be restarted.

IN-12721

The new SipEp.InteropActivateEarlyMediaOnProvisionalResponseAck parameter was added to delay the transmission of the first early-media RTP packet therefore it is no longer blocked by the remote peer network restriction. The interop parameter can have the following values:

• Disabled: During the SIP call establishment, the first RTP packet is triggered by the transmission of the "SIP 183 Progress" (Default behaviour)
• Enabled and all conditions are encountered: During the SIP call establishment, the first RTP packet is triggered by the transmission of the "200 OK" of the PRACK for the "SIP 183 Progress".

IN-12567

VLAN interfaces were being added to the IfTable, overlapping some existing telephony interfaces. Some telephony interfaces were therefore no longer displayed in the IfTable, even if they existed. There is no longer any overlap between the different sources of interfaces in the IfTable.

The packet capture error messages are now displayed on the Web page.

IN-12842

When a TLS persistent connection was created, it would only use the highest supported TLS version for the handshake. If the handshake was refused for version reasons, the connection was closed then re-opened with a lower version. The process would repeat until a version supported by both sides was found. The problem was that this method was both slow and unsafe.

With the new behaviour, the new connection will contain all the supported TLS versions and will negotiate which version to use in the first handshake.  This new negotiation behaviour is faster and safe.

The destination URL is no longer displayed in the "1000-Packet capture started" notification.

IN-12549

When the parameter SipEP.InteropAllowAudioAndImageNegotiation is set to Disable and the unit receives an offer with image and audio, it responds with an actual port on image m=line but the image is disabled and the fax reception fails.  The SipEP.InteropAllowAudioAndImageNegotiation parameter will now support new enum values (DisableOffer and DisableAll) to allow customers to disable image port in an answer.

IN-12567

The voice quality is now better when there is incoming packet loss on the network.

A Virtual machine can be created with a disk capacity higher than the disk capacity configured in VM configuration file.

It is not possible to download large VM images when using some browsers such as Internet Explorer 11.

One-way audio problem may happen on 4124 after many days of uptime on ports 17-24.

This problem does not affect units that have never run the DGW 2.0.35 release.

For units running DGW 2.0.35, that have had the DGW 2.0.35 running, or for units that you do not know if the DGW 2.0.35 load was ever installed, use this work around:

IMPORTANT: Before you start, make sure to take a Configuration Script of your complete configuration.

1. Acces the DGW Web page.
2. Go to System/Hardware.
3. For one of the ports, from the *Signaling *drop-down list, select any value. (make sure to remember the value you are changing)
4. Click Apply.
5. From the Signaling drop-down list, select the initial value you previously changed.
6. Click Apply.
7. Restart the unit.
8. Take a backup of the configuration.

Result: This will rewrite the persistent configuration of the unit with the proper values.

Downgrading to GA version DGW 2.0. 37 and below on a Sentinel 400, with analog cards and without a DSP card, causes the DGW application to stop responding and restart. When the DGW application restarts, the Telif service is stopped. For the unit to work properly, you will need to rollback to a DGW software version higher that 2.0.37.697.

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If more space than permitted is used, unwanted behaviours such as scripts not being properly executed or problems upgrading or downgrading DGW.

It is not possible to use a USB external device to install the Windows Server image (2003 and 2008) OS when creating a virtual machine.