GL Enhances ML PPP & PPP Analysis & Emulation

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GL Communications Inc., announced today the enhanced ML PPP Analyzer and MC ML PPP Emulator protocol tools that emulate and analyze Point-to-Point (PPP), Multi Link Point to Point (ML PPP), and Multi Class ML PPP protocols.

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GL Communications Inc., announced today the enhanced    ML PPP Analyzer and MC ML PPP Emulator protocol tools that emulate and analyze Point-to-Point (PPP), Multi Link Point to Point (ML PPP), and Multi Class ML PPP protocols. Speaking to newsmen, Mr. Karthik Ramalingam, Project Manager at GL, said,” The ML PPP Analyzer captures PPP protocols exchanged between the two nodes over T1 E1 links & provides detailed analysis, which includes distribution of protocols, protocol fields, frame lengths and frame status. The ML PPP Analyzer has the ability to decode PPP, ML PPP and MC-ML PPP packets.

Enhanced ML PPP Analyzer with Packet Data Analyzer (PDA) is a real-time IP and VoIP analyzer that non-intrusively analyzes and captures live IP traffic, and segregates them into SIP / H323 / Megaco / MGCP calls. It also collects statistics, CDRs, detailed protocol traces, ladder diagrams, and a host of other useful information about VoIP calls. Its real-time nature makes it an outstanding tool for live monitoring of VoIP traffic as well as long-term traffic statistics gathering. It can also monitor, report, analyze, and capture calls for infinite time, limited only by the finite space of your hard disk or network hard drive! ”.    

He added, “GL's flexible and versatile MC ML PPP Emulator is both GUI and script based. The application has been added with Multiplexing feature that sends multiple PPP encapsulated packets in a single PPP Multiplexed frame, and each PPP encapsulated frame within a multiplexed frame is called a PPP sub-frame. And sub-frames are concatenated to a make a single PPP multiplexed frame by inserting a delimiter before the beginning of each sub-frame, and as a result, the PPP encapsulation overhead per packet is reduced.

The MC ML PPP Emulator now supports RTP compression, and during NCP negotiation phase of PPP, RTP compression sub-option is used to enable the RTP compression, and once RTP compression sub-option is negotiated, IP/UDP/RTP compression will be enabled conforming to RFC 2508”.

Important features of Packet Data Analyzer (PDA)

•Supported protocols - SIP (Session Initiation Protocol RFC 2543 and RFC 3261), Megaco RFC 3525, Megaco RFC 3015, MGCP, H323/H225, and RTP
•Full RTP Analysis with audio capture/playback supported for all common codecs
•Provides the registration summary of each SIP registration including the user agent, registrar, status, registered time, expiry time, time to live, and remaining time
•Supports saving the selected calls from traffic analyzer into *.HDL or *.PCAP formats
•T.38 Analysis - The application has the call graph and T.38 ladder diagram display. User can decode T.38 frames received over VoIP calls and can have ladder diagram for T.38 traffic flow, reassemble the fragmented data and to identify the T.30 message from it
•Triggered Actions and E-mail Support
•Record audio and video data of a session to a file in QuickTime format
•R factors/MOS supported for more audio and video codecs: Mulaw, Alaw, G726 (40 kbps), G726 (32 kbps), G726 (24 kbps), G726 (16 kbps), GSM610, G729, G729B, AMR, ILBC (20 msec), ILBC (30 msec) and SPEEX, EVRC, EVRCB
•Call Quality Of Service (QOS) for all calls with E-Model based (G.107) Mean Opinion Score (MOS) and R-factor with individual and summary statistics presented in graphical and tabular formats
•Alert Summary tab provides summary of the each alerts that have occurred during the analysis. Each summary has the following columns: Call#, Protocol, Message, Type, Threshold, Value, Caller, Callee,
•Support for H.263+ provides video capture and videoconference monitoring capability

Important existing features of MC MLPPP Emulator:

•ML PPP Emulator as a Router

The Emulator allows users to setup routing table by configuring IP-Address and Mask. Once configured, the Emulator forwards the IP packets which match routing criteria over T1 E1 links. Emulator respond to all ARP requests whose IP addresses present in routing table.

The emulator allows mapping of user defined class of service into ML PPP class/ PPP Link based on length, source IP address, destination IP address and Type Of Service of the received IP packets, set in priority dialog table.

•ML PPP Emulator as a Bridge

When the emulator is configured to act as bridge between two networks, all ARP and traffic (checked against the priority table) received from the network is encapsulated as BPDU (Bridging Protocol Data Unit) and streamed over T1 E1 links. The Emulator on another network removes BPDU header, either converts to Ethernet traffic or adds Ethernet header and streams to the destination.

•IP compression

MC ML PPP Emulator supports the following IP compression standards: Van Jacobson Compression and IP Header Compression.


MC ML PPP Emulator supports various impairments at PPP layer - CRC error, frame error, frame duplication, and more. Also supports various Fragment/Packet impairments for each Class at ML PPP level

About GL Communications Inc.

Founded in 1986, GL Communications Inc. is a leading supplier of test, monitoring, and analysis equipment for TDM, Wireless, IP and VoIP networks. Unlike conventional test equipment, GL's test platforms provide visualization, capture, storage, and convenient features like portability, remotability, and scripting.

GL’s TDM Analysis & Emulation line of products includes T1, E1, T3, E3, OC-3, STM-1, analog four-wire, and analog two-wire interface cards, external portable pods, and complete system solutions. Capabilities include voiceband traffic analysis and emulation across all traffic types (voice, digits, tones, fax, modem), all protocols (ISDN, SS7, GR-303, Frame Relay, HDLC, V5.X, ATM, GSM, GPRS, etc.), and with capacities up to thousands of channels.

GL’s VoIP and IP products generate / analyze thousands of calls / traffic simultaneously with traffic types such as frames, packets, voice files, digits, video, tones, noise, and fax using G.711, G.729, AMR, EVRC, GSM and a range of other codecs. Additional features include visual analysis, real-time listening, and recording. The product line also includes Ethernet / IP Testing capability that simulates and checks frame transport and throughput parameters of Ethernet and IP networks, including delay, errors and other impairments.

GL's Voice Quality Testing (VQT) product line complements all of GL's products. Using ITU-standard algorithms (PAMS, PSQM, and PESQ), GL's VQT provides a widely excepted solution across the telecom industry. Voice Quality Testing across multiple networks (T1, E1, T3, E3, OC-3, VoIP, Wireless, and Landline) are all available.

GL’s Wireless Products perform protocol analysis and voice quality assessment on GSM, CDMA and UMTS networks. Connections can be made to any wireless phone with automated call control, GPS mapping and real-time signal measurements.

GL’s Echo Canceller testing solutions provide the broadest range of simulation and analysis, including compliance testing per G.168 and G.160 across TDM, IP, VoIP and Wireless networks. GL’s wireless VQT solutions help assessing impairments to voice quality such as poor mobile phone quality, voice compression and decompression algorithms, delay, loss and gain in speech levels, noise, acoustic and landline echo, and other distortions are easily assessed and accurately measured.

GL’s Handheld data testers can test a wide variety of communications facilities and equipment including T1, fractional T1, E1, fractional E1, T3 and E3 modems, multiplexers, CSU, DSUs, T1 CSUs, DTUs, NTUs and TIUs and more. The testers provide convenience, economy, and portability for almost any interface, including RS232, RS-422, RS-530, X.21, T1, E1, T3, E3, and many others.

GL’s Network Surveillance and Monitoring products include Probes for TDM, IP, VoIP, ATM, and Wireless networks. An open standards based approach provides a scalable, feature rich, real-time access to network intelligence. Centralized or distributed access, efficient transport and database loading allow compatibility with 3rd party and standards based monitoring systems.

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