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GL has released its enhanced VoIP Testing tool, PacketGen, a software-based VoIP Testing tool for real-time VoIP bulk call generation, stress testing and analysis of VoIP networks and equipment.

Karthik Ramalingam, project manager, said: ‘PacketGen is based on a distributed architecture with SIP and RTP software cores modularly stacked in one or many PCs to create a scalable, high-capacity test system capable of more than 1000 simultaneous calls with SIP and RTP generation.

‘This performance is with a G.711 codec but other codecs may provide higher call densities.

PacketGen’s distributed architecture as well as greater PC performance are key factors in achieving the higher call densities.’ He added: ‘Up to 20 Sipcores can be run on the same PC or a multiple PC system.

All 20 Sipcores can be remotely controlled from a single system.’ Other features include codec support for EVRC and EVRCB with silence suppression and G.711 Appendix II.

RTP script editor is enhanced with define user tone, helping users to define multiple tones before monitoring receive tone action.

The tone label helps in identifying the type of tone detected.

The user can trigger some actions like IVR applications based on the tone detected.

The ability to send reliable provisional responses and start early media actions has been added.

Required and supported options are available.

Time and Power qualifications for digit detection are supported.

The detected digit’s on time or power must be more than equal to the value set by user for the digit to be detected.

This option allows the user to decide whether to send outbound digit codec information in the SIP signaling.

If option is true, then the RFC 2833 codec will be included in the m= line of the outgoing SDP (either in an outgoing Invite or in an outgoing 200 OK in response to Invite).

Also, corresponding a=rtpmap and a=fmtp attribute lines are added.

The command has been added to control the outbound info as in GUI.

This option helps user control sending/detecting of outbound digit codec in the SIP signalling.

If the option is set to ‘true’ then PacketGen can detect outbound digits and if it is set to ‘false’ the application cannot detect outbound digits.

Script editor has been enhanced with a monitor tone option that helps the user to detect single/dual frequency tones.

The NAT address option has also been modified so that the PacketGen is configured to send only NAT address in a contact header while sending any request.

The command line has been added to set/reset the required or supported flag.

It has also been modified to read the G726 packing type from the user agent configuration automatically.

The application supports LSB and MSB packing for EVRC payload and the user can choose the value by editing the appropriate file.

G726 packing type has been moved from SIP call parameters to media parameters.

G726 codec options dialogue displays the packing type and the default value is set to RTP.

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