Digital Central Office Switch Simulator (DCOSS) 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 1 1
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Overview 3
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 4
DCOSS Platforms Rackmount Platforms – 4 U Rack Mount Chassis Lunchbox / Semi- Portable Platforms – Lunchbox PC System OMC Lunchbox Tower Platforms – Lunchbox PC System OMC Lunchbox 5
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 6
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) 7
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) 8
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) 9
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 10
Configurations Call Generation Configuration 11
Configurations Loopback Configuration Switching Configuration 00 12
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 13
DCOSS Analog Phone Simulator … • Remote-access to control functionalities – manual calling, bulk calling, view statistics, and so on 14
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 15
DCOSS Analog Station Connect 16
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) 17
PC to Phone over IP 18
Voice over DSL/Cable 19
DCOSS T3 Solutions 20
IVR System Testing • Voice menu testing (using bulk call scripting) • Voice recognition testing (using bulk call scripting) 21
Voice Mail System Testing • Voice files loading (send / record) • DTMF / MF digit generation / detection • Voice quality testing • Voice menu testing (using bulk call scripting) 22
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) 23
Testing Conventional COs via SS7 24
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 25
Route Configuration SS7 Configuration - General SS7 Configuration - Routes 26
Links Configuration SS7 Configuration - Links SS7 Configuration - Circuits 27
Parameter Configuration & Captured Events SS7 Message Parameters Captured SS7 Events 28
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 29
DCOSS ISDN PRI D Channel ISDN PRI Parameters D-Channel Status 30
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 31
BRI Phone Simulator (BPS) … ISDN BRI Terminal Equipment Setup ISDN-BRI Setup • Configure the ISDN BRI phones (ST- or U-Interface) • Automatically answer the incoming calls and place calls on the selected timeslot / trunks 32
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 33
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) 34
DCOSS Events Display Real-time Call Records Real-time Phone Status 35
Captured Events Real-time Capture Events Real-time Capture Error Events 36
Call Status Real-time Call Statistics Capture Call Status 37
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 38
Manual Call Generation/Reception Place Call Answer Call • 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) 39
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 40
Bulk Call Generation / Reception • Automatically generate a multitude of calls on any timeslot / trunk 41
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 42
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 43
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