GL Announces MAPSTM SIP-I (Session Initiation Protocol with ISUP)

Top Quote GL Communications Inc. announced today the release of its latest product MAPSTM SIP-I , an advanced protocol simulator/tester for SIP-ISUP simulation. End Quote
  • (1888PressRelease) August 23, 2011 - Gaithersburg, Maryland, USA - GL Communications Inc. announced today the release of its latest product MAPSTM SIP-I , an advanced protocol simulator/tester for SIP-ISUP simulation over IP. And also can simulate SIP signaling with encapsulated ITU/ANSI/ETSI ISUP messages. Addressing a press conference, Mr. Karthik Ramalingam Project Manager at GL said, "VoIP networks predominantly use SIP to setup and tear down voice calls and increasingly for video and multimedia calls. PSTN networks predominantly use SS7 to do the same. PSTN SS7 signaling is quite different from SIP signaling and in many cases PSTN SS7 signaling may be richer than SIP. There may be no one-to-one correspondence between SIP signaling messages and SS7 signaling messages. Also, it may not be possible to enhance SIP to accommodate the additional features of SS7, and vice-a-versa."

    He added, "Another consideration, the mobile network uses SS7 signaling througout and is evolving to an all IP network, hence it is advantageous to transport voice using SIP with SS7 routing capabilities intact - thus the need for SIP to SS7 interworking. The basic SS7 messaging is shown in the picture. When a SIP-I is used to bridge the SS7 endpoints, the ISUP messages are carried (encapsulated) along with SIP signaling messages - also shown in the picture provided below."

    Mr. Ramalingam further added, "As shown above, the ingress gateway, the IP Network, and the egress gateway provide a bridge for the SS7 signaling and traffic. SIP-I provides a framework for the integration of ISUP within SIP. The ingress and egress gateways, at the point of interconnection provide the SS7 ISUP message encapsulation and vice a versa. RTP is used to carry voice traffic as usual within the SIP network from gateway to gateway."

    He added, "GL's Message Automation & Protocol Simulation™ (MAPS™) product with SIP-I provides only the IP side of the Gateway at both ingress and/or egress depending on what one is trying to emulate. In general, MAPS™ is a powerful Protocol Test platform, supporting a wide range protocols including TDM , IP, and Wireless infrastructure protocols."

    Other Important features:

    •Simulates Signaling Gateway, Softswitch as UAC, UAS, in the network
    •Handles Retransmissions and remote Retransmissions
    •Supports both UDP and TCP
    •Generates and processes SIP-I valid and invalid messages
    •Fully integrated, complete test environment for SIP-I
    •Supports complete customization of call flow and messages

    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, OC-12, STM-1, STM-4, 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, LTE, etc.), and with capacities up to thousands of channels. Our newest products provide astonishing capacity and capture capability up to and including gigabit speeds.

    GL's VoIP and IP products generate / analyze thousands of calls and traffic simultaneously with traffic types such as frames, packets, voice files, digits, video, tones, noise, and fax. Almost all codecs are supported including G.711, G.729, AMR, EVRC-A,B,C, GSM, iSAC, and many more. 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 accepted solution for assessing voice quality in the telecom industry. Voice Quality Testing across multiple networks (T1, E1, T3, E3, OC-3, OC-12, VoIP, Wireless, and Landline) are all available.

    GL's Wireless Products perform protocol analysis and voice quality assessment on GSM, CDMA, UMTS, and LTE 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 line and acoustic echo. GL's compliance testing per G.168. G.167 and P.340 across TDM, IP, VoIP and Wireless networks is widely accepted in the industry.

    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 characteristics. Centralized or distributed access, efficient transport and database loading allow compatibility with 3rd party and standards based monitoring systems.

    For more information about GL's complete line of products,


    Shelley Sharma
    Phone: 301-670-4784 ext. 114
    E-mail: info ( @ ) gl dot com

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