Digital Central Office Switch Simulator (DCOSS) 818 West Diamond - - PowerPoint PPT Presentation

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818 West Diamond Avenue - Third Floor, Gaithersburg, MD 20878 Phone: (301) 670-4784 Fax: (301) 670-9187 Email: info@gl.com Website: http://www.gl.com

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Digital Central Office Switch Simulator (DCOSS)

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Overview

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Applications

• Simulating and testing advanced telecom networks and products

➢ Mini Switch - call switching with protocol conversion ➢ T1/E1 - verifying T1, E1, T3, and OC-3 signaling protocols of new systems ➢ Phones - Analog and Digital BRI phone handsets ➢ SS7, SS5, ISDN, MFC-R2, R1, CAS, E&M

• Switches calls among timeslots / trunks with protocol conversion capability (ie. SS7 to PRI-ISDN)
• Trunk monitoring, and remote access
• Voice quality assessment using PESQ LQ/LQO, PAMS, and PSQM (+)
• Traffic generation / reception for load testing digital / analog trunks

➢ PCM voice files, DTMF/ MF digits, tones, faxes, modem traffic ➢ Manual or Automatic (Bulk Calling) Mode

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Rackmount Platforms – 4 U Rack Mount Chassis Tower Platforms – Lunchbox PC System OMC Lunchbox Lunchbox / Semi- Portable Platforms – Lunchbox PC System OMC Lunchbox

DCOSS Platforms

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Specifications & PC Requirements

• 16 (max) T1/E1 digital trunks (s/w selectable T1/E1)
• 64 (max) 2-wire (RJ-11) analog phone ports
• BRI-ISDN phone supports ST-Interface, Terminal and Network
• Dual/Quad T1/E1 Hardware (Software Selectable Trunks)
• SS7 messaging board with optional V

.35 or T1/E1 interface

• Individual timeslot (port) or full FAX capability per E1/T1 board
• V

.90/V .92 Modem support (96 port capability)

• Portable lunchbox, rack-mount, tower or any other computer configuration
• WinXP OS

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DCOSS Protocols Support

T1 -

• R1 (Wink Start)
• Digital Loop Start, Ground Start
• Feature Group D
• PRI ISDN (AT&T, Nortel, NI2, QSIG, Asian)
• SS7 (ISUP, TUP, TCAP)

E1 -

• R1
• MFC - R2 (many country variants supported)
• Australian P2
• European Digital CAS
• Digital E&M
• PRI ISDN (Europe, QSIG, Asian)
• SS7 (ISUP, TUP, TCAP)

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Features

• High density network solution for stress testing of TDM equipment and networks
• Support for up to 16 digital T1/E1 trunks (software selectable) with 480 maximum concurrent calls
• Supports high density FXO (2-wire analog) simulation and BRI ISDN (Terminal) simulation
• Supports up to 64 Analog FXS lines and 16 BRI ISDN ports
• Up to 220,000 bulk calls per hour (E1 SS7 / ISDN)

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Features…

▪ Multiple probes with single GUI and remote access ▪ Multiple simultaneous remote clients accessing individual probes ▪ Automated traffic generation / reception with full synchronization including voice / fax / modem / digits / tones ▪ Automated script control of traffic ▪ Voice quality measurement using ITU-P.862.1 and 862.2 (wideband codecs)

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Features…

• Results include Jitter and Noise / Signal levels
• Voice Quality Rating of results as Excellent, Good, Fair, Poor
• Unlimited storage of results for analysis
• Collection and transmission of measurement data to central site database
• Software defined architecture

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Configurations

Call Generation Configuration

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Switching Configuration Loopback Configuration

Configurations

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DCOSS Analog Phone Simulator

• Converts a GL DCOSS into an analog phone simulator
• Can simulate bank of 24, 48, 96 up to 384 analog telephones
• Test a Central Office (CO), PBX, Gateway, or other telecommunication equipments
• All functionalities of DCOSS are supported including Fax and Modem

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DCOSS Analog Phone Simulator…

• Remote-access to control functionalities – manual calling, bulk calling, view statistics, and so on

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DCOSS Analog Phone Simulator…

• End-to-End evaluation of DUTs using analog interfaces
• Automated Voice Quality Testing (VQT)
• Fax and modem testing
• Bulk calling w/ scripting & remote client - server architecture

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DCOSS Analog Station Connect

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Phone-to-Phone Over IP

• Voice path and quality testing
• DTMF / MF / MFC-R2 / Tones transmission quality
• Protocol signaling supported – SS7, PRI-ISDN, CAS (i.e. MFC-R2, R1)
• Fax and modem data traffic
• Protocol conversion (i.e. SS7 to PRI-ISDN)

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PC to Phone over IP

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Voice over DSL/Cable

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DCOSS T3 Solutions

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IVR System Testing

• Voice menu testing (using bulk call scripting)
• Voice recognition testing (using bulk call scripting)

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Voice Mail System Testing

• Voice files loading (send / record)
• DTMF / MF digit generation / detection
• Voice quality testing
• Voice menu testing (using bulk call scripting)

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DCOSS SS7

• SS7 Layers supported: MTP, ISUP, TUP, TCAP, SCCP
• Access to all MTP / ISUP parameters
• Modify SS7 message parameters (IAM, ACM, REL) and link to specific circuit group
• Additional SS7 messages available (CQM, CGB, CGU, GRS)

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Testing Conventional COs via SS7

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Features

• User-friendly SS7 configuration GUI
• Continuity testing with configurable parameters
• Circuit mapping to voice timeslots / trunk of all configured circuit groups
• One or two OPC’s supported with up to 32 signaling links
• Dual T1, Dual E1, V

.35 SS7 signaling interfaces available

• SS7 configurations saved to database

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Route Configuration

SS7 Configuration - Routes SS7 Configuration - General

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Links Configuration

SS7 Configuration - Links SS7 Configuration - Circuits

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Parameter Configuration & Captured Events

Captured SS7 Events SS7 Message Parameters

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SS7 SLTM (Signaling Link Test Message)

• Provides insight reasons for SS7 signaling link being down
• To establish an SS7 signaling link between two points, a series of SLTM’s are sent and acknowledged

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DCOSS ISDN PRI D Channel

ISDN PRI Parameters D-Channel Status

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DCOSS BRI ISDN ST/U-Interface

BRI Phone Simulator (BPS)

• BRI Phone Simulator (BPS) supports 8 to 128 BRI digital telephones per DCOSS system
• Voice, fax and modem call generation and reception
• DTMF/MF generation and detection
• Single / dual frequency tones generation and detection
• Call monitoring and recording

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BRI Phone Simulator (BPS)…

ISDN-BRI Setup ISDN BRI Terminal Equipment Setup

• Configure the ISDN BRI phones (ST- or U-Interface)
• Automatically answer the incoming calls and place calls on the selected timeslot / trunks

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BRI Phone Simulator (BPS)…

• DCOSS with E1 interfaces and E1 PRI ISDN protocol
• BPS converts the E1 PRI ISDN calls to BRI Terminal , simulating standard BRI digital telephones
• PRI ISDN E1 connection to the BPS, generates a series of 8 to 128 BRI digital ports (each with two B-channels)
• DCOSS BPS can also generate SS7, PRI ISDN, or CAS calls with full automation & traffic simulation available

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DCOSS CAS State Machine

Script Editor

• Perform in-band call processing
• Signaling bit transitions and detection, generation and detection of DTMF and MF digits
• Control over the various conditions within the protocol (seizure, incoming, answer, release, busy)

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DCOSS Events Display

Real-time Phone Status Real-time Call Records

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Captured Events

Real-time Capture Events Real-time Capture Error Events

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Call Status

Capture Call Status Real-time Call Statistics

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DCOSS Functions

• Manual & bulk call generation / reception – talk over phones
• Send / receive voice files, DTMF, tones
• Send / receive faxes (requires optional DCOSS fax licenses)
• Send / receive modem traffic (V

.21, V .23, V .34, V .90, V .92) (requires optional modem hardware)

• Voice / Fax / Modem call quality testing
• Phone / SS7 TCAP routing

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Manual Call Generation/Reception

• Generate calls manually –

➢ From a standard phone to a standard phone ➢ From a standard fax machine to a standard fax machine ➢ Software originated call to a standard phone or fax machine ➢ Software originated call to a number not corresponding to a standard phone or fax machine (without physical connections) Place Call Answer Call

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Demo of Manual Call Generation

E1: 0 E1: 1

• Phone
• to -

Phone

• Phone
• to -

PCM file Tx (several files in succession)

• Phone
• to -

PCM file Rx

• Phone
• to -

Digit Tx

• Phone
• to -

Tone Tx

• PCM file Tx - to -

PCM file Rx

• PCM file Tx - to -

PCM file Rx w/VQT

• Fax
• to -

Fax

• Fax Machine
• to -

Fax

• Modem - to -

Modem

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Bulk Call Generation / Reception

• Automatically generate a multitude of calls on any timeslot / trunk

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Bulk Call Scripting

• User-friendly script editor; re-use saved scripts
• Conditional statements and DO LOOPS
• Scripts defined for a single timeslot
• Execute an external program from within the script

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Bulk Call Scheduler

• Automatically load master configurations and begin bulk calling
• Bulk call scheduler operation modes

➢ Immediate - begin bulk call Immediately and execute for user-defined bulk call duration ➢ Run daily – user-defined starting-time and bulk call duration ➢ Run once – user-defined start-date/starting-time and bulk call duration

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Bulk Call Scheduler…

Run Daily Immediate Run Once

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DCOSS Routing Configuration

• Calls originating from a handset (or originated via the SS7 TCAP layer) are directed to a specified timeslot / trunk based on the configuration

Phone / SS7 TCAP Routing Configuration

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Switch Routing Configuration

• Used to configure called / calling number switch routing
• Types of timeslot switch routing available within DCOSS -

➢ Switch routing based on the called number (or calling number) ➢ Switch routing based on incoming timeslot Called # Switch Routing Timeslot Switch Routing

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Busy Call Routing Configuration

• When a busy call is detected, all the outgoing calls can be directed to a specified timeslot / trunk based on the configuration

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Automated Attendant Routing Setup

• Configure the DCOSS to answer a call, play a series of user-defined prompts, and also to gather information in the form of DTMF

digits

• Extensions (for routing purposes) are used to route the calls out of the DCOSS based on the user-defined timeslot and trunk

Routing Script Editor Extension Routing Table

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PCM Voice Files Generation / Reception

• Send and record voice files on established calls
• Supports -law PCM, A-law PCM, and WAV files
• Send files continuously
• Manual or automatic control of file generation / reception
• PCM voice file may be transmitted over Trunk 0 and recorded over Trunk 1 as a -Law (A-Law) PCM voice file
• Voice Quality Testing (PAMS, PSQM/PSQM Plus, PESQ)

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Send / Record Voice Files

• Record and playback of PCM ( a-law, μ -law) & wav voice files simultaneously over all timeslots
• Includes voice quality testing using PAMS, PSQM, PSQM Plus, and PESQ

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DTMF / MF Digit Generation / Reception

• Manual or automatic control over digits
• Send or detect digits over established calls
• Broadcast digits over all timeslots
• View detected digits on all trunks and timeslots simultaneously
• Change digit parameters

➢ On-time, Off-time, Transmit levels ➢ Threshold levels

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Send & Receive DTMF/MF Digits

• Transmit and detect DTMF/MF digits simultaneously over all timeslots
• Transmit and detect single- or dual-frequency tones simultaneously over all timeslots

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Frequency Tone Generation & Reception

• Send or detect single or dual frequency tones on established calls
• View detected tones on all trunks and timeslots simultaneously
• Change tone parameters (generate, detection)

➢ Single or dual tones ➢ Frequency, power level, on-time, off -time, iterations

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Modem Signal Generation / Reception

• Send / receive modem traffic (V

.21, V .23, V .34, V .90, V .92) simultaneously over all timeslots

• Includes modem quality assessment

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Fax Call Generation / Reception

• Real-time fax call generation / reception (V

.29, V .27, V .17, V .33) simultaneously over all timeslots

• Includes fax quality assessment

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Send and Detect Frequency Tones

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Call Quality Assessment

• Pass/Fail Calls using user-defined pass criteria

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Fax and Modem Quality Testing

• Modem quality test parameters – number of bad bytes , transmission speed , frame retransmissions , renegotiations, and so on
• Fax quality parameters - number of received fax pages , file size , bad lines , transmission speed, and reference file

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Remote Access Client

• Access DCOSS remotely over LAN / WAN / Internet
• Many clients to many servers
• User-friendly DCOSS Client GUI and command-line applications
• Support for Windows / Unix / Linux / Solaris
• Full developer access to client OCX / DLL

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Remote Access Client…

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Thank You !