VoIP Testing Using VQuad™

VoIP Testing using VQuad™

Overview

Testing on the extreme end-point of a VoIP softphone network has become a priority for many service providers. This method of testing represents what an end user is actually experiencing.

Voice quality testing within VoIP networks is growing; a major concern is testing VoIP softphones that will be used with VoIP networks. The GL VQuad™ with VoIP option along with Voice Quality Testing (VQT PESQ) software provides the ability to perform manual or automated tests on the VoIP network.

The VQuad™ with VoIP option provides the ability to perform manual or automated tests on the VoIP network. The VQuad™ provides direct connection to the VoIP network with up to eight instances connected simultaneously. Using the VQuad™ software, the user may configure automatic call control (SIP protocol) along with automatic generation / reception of voice files. Path confirmation using digits or frequency tones is also available in an automated or manual operation.


		VQuad™ User's Guide

		VQT WebViewer™ User's Guide

		Complete VQT Brochure

		Product Presentation

		Training Presentation

The VQuad™ along with the Dual UTA can connect to a VoIP network in several ways including through an ATA (the Dual UTA simulates the analog phone), through a Softphone (the Dual UTA provides Balanced I/O ports), via wireless (the Dual UTA connects to any mobile phone using Bluetooth technology), and through the customer’s phone itself (the Dual UTA can replace the handset of ANY analog, digital, or VoIP phone). The VQuad™ can also act as an end point and directly connect to the VoIP network via SIP protocol.

The VQuad™ when simulating the VoIP end point User Agent or the Analog 2-wire Phone supports full Call Control included supplementary services such as 3-Way Calling. The VQuad™ also supports path confirmation, send/record voice synchronously for VQT PESQ results and full scripting of the test. Additional measurements include Round Trip Delay, One Way Delay and a variety of Echo testing.

VQuad™ supports Data Testing including TCP, UDP, VoIP, HTTP, FTP, DNS and SMS. The Data Tests are configured via the VQuad™ scripting and support the PC Ethernet connection (wired, WiFi, Broadband 3G/4G) or mobile device. Using the optional GL’s Mobile Device Controller application and the supporting downloadable apps on the Smartphones (iPhone, Android), the VQuad™ can remotely perform the data tests when the phone is within a voice call or outside a voice call.

Recently VQuad™ is enhanced to support Fax testing (sending and receiving) up to 4 independent and simultaneous T.30 faxes. The user can configure the Tx and Rx fax rate from 2400 baud to 33600 baud with V.34 fully supported. Interfaces supported for fax generation include 2-wire FXO and 4-wire analog. Support for additional interfaces such as T1/E1 and VoIP (T.38) are coming soon.

VQuad™ with Dual UTA can be purchased as a single unit (VQT270), which includes VQuad™, Dual UTA and PC. Control via Ethernet Remote Desktop (with support for mouse/keyboard). See Buyer’s Guide for complete details.

Additional Information

Main Features:

Connect at endpoint of a VoIP network
Supported Codec's:
- G.711 (µ-law/A-law - 64kbps)
- G.711 App II (A-Law and µ-Law with VAD)
- G.729, G.729B (8 kbps)
- G.726 (5 bit 40 kbps/4 bit 32 kbps/3 bit 24 kbps/2 bit 16 kbps)
- G.726 (40/32/24/16 kbps with VAD)
- GSM (13.2 kbps)
- AMR (4.75kbps, 5.15kbps, 5.9kbps, 6.7kbps, 7.4kbps, 7.95kbps, 10.2kbps, 12.2 kbps)
- AMR WB (Wideband codec - 6.60kbps, 8.85kbps, 12.65kbps, 14.25kbps, 15.85kbps, 18.25kbps, 19.85kbps, 23.05kbps, 23.85 kbps)
- EVRC (Rates - 1/8, ½ and 1), EVRC0
- EVRCB (Rates - 1/8, ¼, ½ and 1), EVRCB0
- EVRC_C
- SMV (Modes - 0, 1, 2 and 3- Available if licenses are provided or owned, please call GL)
- iLBC (15.2kbps and 13.33kbps)
- SPEEX (Narrow Band, Wideband))
- G722
- G722.1 (24 kbps and 32 kbps Wideband)
- iSAC - (An optional Codec, must be purchased as a separate dongle extension)
Click here for more comprehensive information on the above codecs.
Connect directly to ATA, Softphone, Phone Handset, or Wireless via Bluetooth®
Fax generation for 2-wire FXO and 4-wire analog interfaces
Connect at endpoint of a VoIP network using SIP protocol with user-defined parameters for Authentification and Proxy
Up to eight interfaces connected to a single VQuad™ system
Manual or Automatic call control (SIP protocol) with user-defined parameters for authentification and proxy
Automatic send/receive of voice files over already established calls
Time/Digit/Tone triggering of send/receive voice files.
Round Trip Delay, One Way Delay, Echo measurements, and Data Testing
Compact and portable solution for testing end-to-end voice quality
GL VQT Automatic Mode allows automatic execution of the VQT algorithms (PESQ LQ/LQO/WB)
Additional measurements include Clipping, Jitter, Latency, Noise and Signal Levels.
Results available in real-time or post-processing

Waveform/Spectral Viewer

The GL VQT software can be user-configured to provide a rating of each measurement based on the MOS, latency, clipping, etc. A poorly rated measurement can be viewed in graphical format using the waveform viewer. Dropouts, noise and other impairments can be examined here.

Screen Shot of Waveform/Spectral Viewer

Voice Quality Testing (VQT) Results

GL's VQT may be executed automatically (real-time and/or post-processing) or manually by entering a Reference File and Degraded File. Regardless of how GL's VQT is initiated, algorithms for PAMS, PSQM, PSQM+, PESQ MOS and PESQ LQ are executed simultaneously for the two voice files and results are shown graphically as well as in a tabular format. GL's VQT also displays cumulative statistics for large scale testing over long periods of time.

Screen Shot of PESQ Measurement Window

Screen Shot of VQT Measurement Results

Screen Shot of VQT Cumulative Statistics

SIP Call Control

VQuad™ allows users to configure and simulate a user agent (UA) for manual SIP call generation and reception using public URL and contact IP addresses. VQuad™ allows user to place calls between VoIP phones with different user agents. All the calls at the application end will be answered automatically so received calls show the status as Hang-Up indicating that call has been established.

VoIP Device Settings

The user can configure some codecs for call generation or reception through "CodecOptions.ini" file located in the installation folder. This file contains options such as packetisation time (ptime), payload type, and codec options. It also allows the user to select the codecs to be included in the test scenario, i.e, if the test requires only A-law or u-law offered then, those can be selected and the others omitted.

The codec packaging details can be edited in the CodecOptions.ini file directly, with the following restrictions

[CODEC_TYPE] - Allows user to select codecs to be offered in call setup.
[Packetisation_Time] - Minimum Packetisation time varies for codecs.
Payload Type – Unique value for each codec

CodecOptions.ini File Configuration

Screenshots

Buyer's Guide:

Item No.	VQuad™ Network Options
VQT010	VQuad™ Software (Stand Alone)
VQT013	VQuad™ with SIP (VoIP) Call Control
VQT015	VQuad™ with T1 E1 Call Control
VQT018	VQuad™ Lite with Dual UTA FXO and Bluetooth® devices
VQT270	VQuad™ Probe with Dual UTA
Item No.	VQuad™ Miscellaneous
VQT204 VQT204u VQT204e	GPS for Dual UTA
VQT030	Network Command Center (Multi-Node Command and Control Center for VQuad™ Systems)
VQT601	Mobile Device Controller (MDC) Software
VQT022 VQT022a	VQuad™ Fax Emulation (2 simultaneous ports) VQuad™ Fax Emulation (8 simultaneous ports)
VQT241	Dual Universal Telephony Adapter (UTA)
Item No.	VQT Analysis
VQT002	Voice Quality Testing (PESQ only)
VQT004	Voice Quality Testing (PAMS, PSQM, PESQ)
VBA032	Near Real-time Voice-band Analyzer
EMU037	Echo Measurement Utility (EMU) Software
VQT040	VQT Webviewer™

* Specifications are subject to change without notice.

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