Radio emulator features IP address spoofing

Jagdish Vadalia, Senior Manager for Product Development of the company said: “Air Traffic Control (ATC) is migrating to VoIP architecture and away from an outdated analogue infrastructure. Among many other solutions for testing this ATC network, GL offers MAPS ED-137 Radio, to simulate VoIP Air-Ground calls (as per EUROCAE ED137_1B: Radio) and MAPS ED-137 telephone to simulate VoIP Ground-Ground calls (as per EUROCAE ED137_2B: Telephone).”

He added: “The latest release adds important new enhancementsto MAPS ED-137 radio emulator. These include: multiple radio simulation, IP address spoofing, linked session management and support for newuser-events that can be applied dynamically on anestablished call.

Software provides complete control over call scenarios testing, and the ability to customise the network parameters for signalling and VoIP traffic. It has the capability of generating more than 500 simultaneous calls on a core i7 system.”

MAPS ED-137 Radio allows a user to simulate multiple radios in a single instance of MAPS, up to 200 radios (with IP addresses) in one system with each simulated radio having its own set of parameters defined in XML based configuration files. Each simulated radio is a logically separated radio with similar capabilities. Colour codes are used to sort and group all related calls and make it easier to visually distinguish calls belonging to a particular radio.

The IP spoofing feature allows multiple CWPs/radios to be simulated using IP address from a single system. User-specified IP addresses in profile will be created as virtual IP addresses on the NIC interface used by the system.

The linked session functionality provides the Ground Radio Station (GRS) endpoint,an opportunity to detect SIP sessions which are coming from the same user but from different equipment (i.e. different IP Address) to guarantee higher service availability. GRS can identify the calls coming with same user part in ‘from address’ but with different IP/host address and with 'ls-pl' SDP parameter included. It treats the linked sessions as one single logical session to radio.”

He further added: “Many events can be applied on anongoing call either from MAPS CWP or while receiving the calls at MAPS GRS. Some of the supported events include: Apply CLD, ReInvite, Receive Traffic, Apply RRC, Impair, Speaker ON, Apply SQI and the like.”