The IMS Border Gateway Function (BGF) interacts with the SIP subscribers via the media plane and with the controller (SPDF/P-CSCF) with H.248/Megaco protocol based on the TISPAN extensions.  In a deployed network, the media, SIP and Megaco signalling are synchronized. Simulating and troubleshooting this environment in a lab so as to test the IMS BGF before deployment can be a daunting task if multiple independent test boxes/applications are used to emulate the subscribers and the controller. 

The Navtel IMS Border Gateway Function Test application was purposed-built to test the IMS BGF. The application integrates the subscribers and the controller into a single flexible but easy to use GUI  driven  test-bed to enable test engineers to easily perform Feature, Negative, Load, Regression, Interoperability and Scalability testing of IMS Border Gateway Functions.

                                Diagram of Navtel BGF test environment

• Define ANY H.248/Megaco message (Valid, Invalid, Proprietary) using a GUI or text-based editor.
• Create any call flow (Valid, Invalid, and Proprietary). Manipulate protocol state machine using a ladder diagram.
• Define proprietary variables with rules for incrementing and inserting  the variables anywhere into any H.248/Megaco message

• Negotiate and transmit several Codec’s simultaneously (e.g. 50% of G.711, 20% of G.723, 20% of G.729, 10% of calls on hold)
• Negotiate one codec but generate another type with higher bandwidth to test the Theft of Service Protection function of the BGF 
  
  •   e.g. Negotiate 50% of calls with G.711 but override 20% of the negotiated G.711 with G.723 media
• Detect in real-time and at line speed whether the BGF is penalizing RTP streams that do not conform to their negotiated Codec’s/bandwidth
• Path verification for every established stream to verify whether: 
  • Media was detected 
  • Media packets were misrouted 
  • RTP Codec received was not as negotiated
  • ToS/DSCP value for received packets was not as expected
    

• QoS measurements for Delay, Loss, Inter arrival Jitter & MOS with user defined thresholds
• Call Records for each call that fails the Path Verification Test or exceeds the QoS thresholds 
• Up to 15 5tatistics views for 15 combinations of Codec, VLAN and ToS values
• User defined wave files and packetization intervals 
• Rogue Media Testing 
• DTMF in SIP Info and RFC 2833

Download PDF Literature: Datasheet

For more information on this or any other InterWatch solution, please contact sales@navtelcom.com