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TDM, Packet, and Wireless Protocol Analysis

Protocol Analysis

GL's protocol analyzer provides monitoring a communication link in accordance with industry protocol standards by non-intrusively tapping the network under test. The simple framework of the protocol analysis software helps you easily identify the improper sequence of protocol messages, and filter out frames causing the protocol violation.

GL carries the widest array of protocol analyzers for TDM, Wireless, and Packet networks. Based on a uniform architecture with identical features and functions, they can be used flexibly for a wide variety of tasks, including

  • as independent standalone units for simple interface analysis
  • as remote or offline protocol analyzers
  • as "probes" integrated with a network surveillance systems
  • as network elements for advanced traffic collection and processing
  • as a "packet sniffer" to intercept, log, and replay traffic over a digital network
  • as a "network troubleshooter" - drill through huge captured protocol traces using extensive filter and search capabilities, centralized tracking and monitoring
  • a "common standardized UI" to support the testing of 2G, 2.5G, 3G, and 4G networks

Typical examples include, continuous recording of protocol exchange on an SS7 interface, limited only by hard disk or network storage space; or triggering, collecting and filtering for unique subscriber information and relaying such information to a back end processor; or collecting CDR information for billing.


TDM Protocol Analyzers   Packet and Frame Protocol Analyzers   ATM and Wireless Protocol Analyzers
Physical Layer Analysis        
 Protocol Identifier    PPP    ATM
 Channel Associated Signaling   (CAS)    MLPPP    UMTS
 ISDN    Frame Relay    CDMA 2000
 SS7(C7)    UMTS    GPRS
 SS1    CDMA 2000    TRAU
 GR-303    SIP/H.323/MGCP/Megaco/
   Network Surveillance
 V5.X    Network Surveillance    Backhaul Network Testing Solutions
 PPP and MLPPP        LTE (Long Term Evolution)
 T1 Facility Data Link Analysis        
 DCME Test and Analysis        
 E1 Maintenance Data Link        
 Network Surveillance        
 Remote Protocol Analyzer
  (HDLC Based)

Click here to view the protocol glossary page for more information

LTE (Long Term Evolution) Protocol Analyzer

GL's LTE protocol analyzer is capable of capturing, decoding and performing various test measurements across various interfaces i.e. S1, S3, S4, S5 (or S8), S6a, S10, S11, S13 and X2 interfaces of the LTE network.

Physical Layer Alarms & Errors

Physical Layer Analysis line monitoring application is used to monitor T1E1 line alarms (Sync Loss, Carrier Loss, Remote, Distance MF, AIS) periodically and send these information to the central database over TCP/IP.

TDM Protocol Identifier

The Protocol Identifier application can identify various protocols carried on T1 or E1 lines. It is capable of detecting protocols such as ISDN, ATM, HDLC, MTP2, LAPD, SS7, PPP, GSM, GSM Abis, TRAU, and Frame Relay. The timeslots and the subchannels within the timeslots are also identified. Once identified, a detailed protocol analysis can be carried out by individual protocol analyzers. This application is helpful in identifying traffic types at a concentration point, DSX patch panel, or multiplexed facility.

CDMA 2000 Protocol Analyzer

GL's CDMA protocol analyzer is used to analyze and view decoding of Ethernet-based protocols (across Aquinter and Aquater interfaces), ATM based protocols (across Ater interface), & HDLC based protocols (across A interface). .

UMTS Protocol Analyzer

GL's UMTS protocol analyzer is capable of capturing, decoding and performing various test measurements across various interfaces i.e. Iub, Iur, IuCS and IuPS interfaces of the UMTS network. In addition, it supports ATM as the transport layer. It helps in fault diagnosis and troubleshooting UMTS network.

MC-MLPPP Protocol Analyzer

GL's ML-PPP protocol analyzer can be used to capture a host of PPP protocols exchanged between the two nodes over T1/E1 link. It provides a detail analysis of the PPP, MLPPP, and MC-MLPPP protocols.

ATM Protocol Analyzer

GL's ATM protocol analyzer is used analyze and decode different ATM protocols like ATM, AAL2 Protocols (CPS-SDU, SSSAR-SDU, and SSCS), AAL5 (CPCS), UNI etc across U plane and C plane of UNI and NNI interface. The analyzer can also decode ATM frames constituting Classical IP over ATM, or CIP based networks..

GPRS Protocol Analyzer

General Packet Radio Service (GPRS) permits continuous data connectivity over wireless GSM networks. The GPRS protocol analyzer when connected between SGSN and BSS elements of a GPRS network permits the monitoring of Gb interface. Similarly, when connected between SGSN and GGSN elements, permits monitoring of the Gn interface.

TRAU Protocol Analyzer

GL's TRAU protocol analyzer is used to non-intrusively monitor TRAU frames at the Abis interface (between the BTS (CCU) and the TRAU node at BSC/MSC). The application can automatically detect and capture TRAU frames of half rate (HR-8 kbps) or full rate (FR-16 kbps). Various codecs such as FR, EFR, AMR, AMR-WB, HR and Data are used for compression/decompression of speech.

SS7(C7) Protocol Analyzer

GL's SS7 (C7) protocol analyzer performs SS7 analysis in real-time, as well as off-line. The real-time mode of operation is used to capture and analyze stream of frames on the SS7 Links. Captured information can be saved to disk for later off-line analysis. MTP2 is parsed according to ANSI-ITU standards and the higher SS7 layer information parsing depends on the user's selection of TUP, ISUP, SCCP, TCAP, GSM-MAP, IS-41, INAP, etc., according to national and international variants.

GSM Protocol Analyzer

GL's GSM protocol analyzer is used to analyze GSM protocols, a switching and signaling telecommunication protocol between MSC & BSC, BSC & BTS, MSC & SMLC, UMA & MS,. and so on. GSM protocol analyzer also supports decoding proprietary 'Mobis' Interface (Motorola equivalent of the GSM A-bis interface) between BSC (Base Station Controller) - BTS (Base Transceiver Station) and BSC (Base Station Controller) - PCU (Packet Controller Unit). Other interfaces supported include Ls / Lb / Lp Interface (Interface between MSC and SMLC), and Up (Interface between UNC (UMA network controller) and MS).

ISDN Protocol Analyzer

GL's ISDN protocol analyzer is used to capture and analyze streams of frames on an ISDN PRI link. Captured information can be saved to disk for later off-line analysis. LAPD is parsed according to Q.921 and the ISDN information parsing depends on the user's selection of ITU Q.931, AT&T/Lucent switch 4ESS and 5ESS (TR41449, TR41459 and 235-900-342), Nortel's switch DMS-100 and DMS-250 (NIS-A2111-1 and NIS-A211-4), Bellcore National ISDN-2 (NI-2), Euro ISDN (ETS-300 102-1), etc.

HDLC Protocol Analyzer

GL's HDLC protocol analysis and playback software provides the capability to record, analyze, and transmit HDLC data on a full duplex T1 or E1 lines. The HDLC frames may be contained in one or n x 64 kbps or n x 56 kbps data channels. The following variations are accommodated in the software: inverted or non-inverted data, byte reversal or non-reversal. Multiple instances of the program may be invoked to analyze HDLC data in multiple channels.

GR-303 Protocol Analyzer

GL's GR-303 protocol analyzer offers testing for all aspects of GR-303 systems: monitoring the T1 line, monitoring the TMC/CSC control channel, viewing robbed ABCD signaling and dialed digits, listening to voice channels, and thorough tests for the physical layer. The GR-303 protocol analyzer troubleshoots signaling problems between the switch and remote terminal: to determine call status, monitor for any dropped calls, detect any abnormal conditions, and identify when service was unavailable. With these extensive GR-303 protocol analysis tools, you can analyze call setup and monitor communications between network elements and resolve problems as new network challenges emerge.

V5.x Protocol Analyzer

GL's V5.x protocol analyzer is used to view and analyze the V5.X protocol between an Access Network (AN) and a Local Exchange (LE) which operates only on E1 circuits. Using the real-time mode of operation, the V5.x Analyzer can be used to capture and analyze a stream of frames from the link between the LE and the AN. The user can select the ETSI or ITU-T standard from the main menu of the V5.x Analyzer GUI to view the decode according to the corresponding standard.

E1 Maintenance Data Link Analysis (SA Bits HDLC Decode /Store)

The SA HDLC protocol analyzer performs HDLC protocol analysis on E1 timeslot 0 both during real time and off-line using saved files with high level data link (HDLC) frames. The real-time mode of operation is used to capture stream of HDLC frames on the selected even or odd frames of the E1 multiframe on timeslot 0. Captured information can be saved to disk for later off-line analysis. Both real-time and off-line analysis presents summary view and detailed views of HDLC decode information. Captured Frames can later be used for traffic simulation using the SA Bits HDLC transmit application.

T1 Facility Data Link Analysis

GL's Facility Data Link protocol analyzer performs FDL decode and analysis on T1 channels in both real time and off-line using saved files with high level data link (HDLC) frames and bit-patterned extended super frame (ESF) data link messages. The real-time mode of operation is used to capture streams of HDLC frames on the selected cards and also embedded bit-patterned ESF data link messages. Captured information can be saved to disk for later off-line analysis. HDLC frames are parsed according to Q.921, FDL messages are decoded based on the AT&T TR54016, ANSI T1.403, T1.408, I.431, G.963 and G.704.

Frame Relay Protocol Analyzer

GL's Frame Relay protocol analyzer can be used to analyze and decode frames conforming to Q.921, Q.922, LAPF, Frame Relay Forum standard -FRF.9 and FRF.12, Multiple Protocol Encapsulation, LCP RFC1661, Q.933 SVC and LMI SNAP, PPP, IP, SMTP, POP3 and so on. Multiple Protocol Encapsulation analysis is based on ITU TR9577 (Rec. X.263 ), RFC2427.

Real-time & Remote SS1 Protocol Emulator and Analyzer

The GL's SS1 protocol analyzer detects and analyzes tone sequences that make up SS1 dial digits. Sequences of pulse and guard tones are detected, decoded, and assembled into their corresponding dial digits. The tone sequences are also verified for compliance against a "specification" parameter file which can correspond to published standards or user criteria.

CAS (Channel Associated Signaling) Protocol Analyzer

A variety of protocol analysis tools are provided for analysis of CAS protocols. These include

DCME Protocol Test and Analysis

GL's DCME protocol analyzer is ideal for DCME testing, analysis, and verification. The DCME Analyzer connects non-intrusively to the bearer side of DCME equipment. Both real-time and post-processing of the bearer signal is possible. In real-time mode, the status of the bearer including synchronization, bearer loading, fax loading and other statistics are easily monitored. In post processing mode, the entire DCME bearer signal is captured to the PC's hard disk, so the captured file can then be post-analyzed. The data can be displayed to permit bit level analysis and verification of channel mapping and implementation timing of the DCME protocol.

Network Surveillance System

GL's Surveillance System is designed using Open Distributed Architecture. The system is scalable, so that it can be used for various applications like Billing Verification, Fraud Detection, Protocol Analysis, Traffic Engineering, QoS, Call Recording etc. T1/E1 Probes are deployed in the field to monitor various protocols, which are collected at a central site into a database. Various client applications can be developed to interrogate database records. ISDN, SS7, GR-303, V5.x, IS-41, GSM, GPRS, INAP etc. are all supported. The client can access database information remotely, including through Web Browsers.

Remote Protocol Analyzer (HDLC Based)

GL's Remote Protocol Analyzers are functionally similar to real-time protocol analyzers that are integrated with T1E1 Analyzers, however they further provide the users with remote access capability to non-intrusively monitor nework.

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