Transcript VCL-Long Distance Telephony

Valiant Communications Limited
Telecom Transmission Solutions
VCL-LDTM
E1, Digital Voice Compression Equipment
(Digital Circuit Multiplication Equipment - DCME)
INDIA
U.S.A.
U.K.
Valiant Communications Limited
71/1, Shivaji Marg, New Delhi - 110015, India
Phone: +91-11 4105 5601, 91-11 4105 5602
Fax: +91-11 4105 5604, 91-11 2543 4300
E-mail: [email protected]
Website: http://www.valiantcom.com
Valcomm Technologies Inc.
4000 Ponce de Leon, Suite 470
Coral Gables, FL 33146
United States of America
E-mail: [email protected]
Website: http://www.valiantcom.com
Valiant Communications (UK) Ltd
1, Acton Hill Mews,
310-328 Uxbridge Road,
London W3 9QN, United Kingdom
E-mail: [email protected]
Website: http://www.valiantcom.com
Updated : January, 2006
Copyright, Valiant Communications Limited - 2006
Slide 1
VCL-LD, E1 Voice Compression Equipment
Introduction
• VCL-LDTM E1, DCME (Digital Circuit
Multiplication Equipment) Voice
Compression Equipment.
• Provides 30, "toll quality" voice channels
using an 8:1 compression ratio (10:1
Compression Ratio without signaling), in a
bandwidth of 256kbps*.
• This is accomplished using an advanced digital signal processor (DSP) based
Virterbi decoder with automatic voice / silence detection (VAD) and adaptive
comfort noise generation (CNG).
• ITU-T G.703, G.704 interface compliant.
• E1 signaling support for R2, CAS (ABCD) Digital Signaling, PRI ISDN (Q.931),
SS7 and C7 Signaling.
• Proven to outperform CELP, RELP, VSELP, MELP, ECELP, MP-MLQ,
LPC-10 and other competitive technologies.
Copyright, Valiant Communications Limited - 2006
Slide 2
VCL-LD, E1 Voice Compression Equipment
Applications
• Satellite Communications.
• Long Distance Telephony
• Digital Mobile Radio
• Prepaid Calling Card Service
• Secure Communications
• Call Center Applications
• Cellular Telephony and PCS
• Rural Telephony
• Voice Multiplexing
• Voice Mail
Copyright, Valiant Communications Limited - 2006
Slide 3
VCL-LD, E1 Voice Compression Equipment
Features
• Support for multiple signaling platforms including CAS R2, PRI ISDN and
SS7 # Signaling.
• Echo cancellation: Echo canceller card cancels echo up to 128ms.
• E1, 30 voice channels in 256Kbps bandwidth (4, DS-0's ) for voice only
application.
• E1, 30 voice channels in 384Kbps (6, DS-0’s ) for voice, fax and data modem
support.
• Ideal choice for satellite communications, digital mobile radios, cellular
network, long distance telephony service providers (including pre-paid calling
card operators), corporate customers for linking intercity voice networks,
national and international call-center applications, and ISPs wishing to provide
reliable long distance telephony service to their customers.
• Modular Architecture - reduces downtime - dual port per card.
• Scalable - Build as you grow.
• Transport over point-to-point satellite links and dedicated leased lines.
• Superior Voice Quality.
• Robust to Bit Errors & Background Noise.
Copyright, Valiant Communications Limited - 2006
Slide 4
VCL-LD, E1 Voice Compression Equipment
Features
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High Quality Low Data Rate Speech Coding.
Forward Error Correction.
Voice Activity Detection (VAD) / Comfort Noise Insertion.
Single and Dual Tone (DTMF) Detection and Generation.
Minimal algorithmic processing delay.
DTMF detection and regeneration.
Support fax and data modems @ upto 33.6Kbps data rates.
Highlights
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E1, 30 Toll-Quality voice channels in 256Kbps of bandwidth.
8:1 compression ratio (10:1 without signaling channel).
128 ms. adaptive Echo Cancellation.
DSP based Viterbi Decoder for superior voice quality.
3U high, compact construction.
Extensive set of alarms.
User selectable clock sources.
Support fax and data modems @ upto 33.6Kbps data rates.
Copyright, Valiant Communications Limited - 2006
Slide 5
VCL-LD, E1 Voice Compression Equipment
Mean Opinion Score:MOS
Performance
4.0
3.5
3.0
2.5
2.0
1.5
1.0
Voice Quality Vs. Bit Rate
Copyright, Valiant Communications Limited - 2006
Slide 6
VCL-LD, E1 Voice Compression Equipment
Application of VCL-LDTM DCME
International & Domestic Long Distance Telephony - A
PSTN
Switch
VCL-LD
E1, CAS R2
PRI ISDN (Euro ISDN)
C7, SS7 Signaling
Fractional E1
Compressed @ 256 kbps
Satellite / Leased Line
VCL-LD
E1, CAS R2
PRI ISDN (Euro ISDN)
C7, SS7 Signaling
PSTN
Switch
Copyright, Valiant Communications Limited - 2006
Slide 7
VCL-LD, E1 Voice Compression Equipment
Application of VCL-LDTM DCME
Long Distance Application - B
Satellite link
PRI ISDN (23B+D)
or
E1 C7/SS7 Signaling
256K Compressed E1
Fractional E1
Format
256K Compressed E1
Fractional E1
PRI ISDN (23B+D)
Format
or
E1 C7/SS7 Signaling
E1
E1
VCL-LD
E1 DCME
Copyright, Valiant Communications Limited - 2006
VCL-LD
E1 DCME
Slide 8
VCL-LD, E1 Voice Compression Equipment
Application of VCL-LDTM DCME
Call Center Application
PSTN
Switch
VCL-LD
E1, CAS R2
PRI ISDN (Euro ISDN)
C7, SS7 Signaling
Fractional E1
Compressed @ 256 kbps
Satellite / Leased Line
TM
VCL-LD
Call Centre
Copyright, Valiant Communications Limited - 2006
Slide 9
VCL-LD, E1 Voice Compression Equipment
Long Distance Telephony
2 or Multiple E1’s - DCME Application
Satellite link
E1
E1
VCL-LD
E1 DCME
256K Compressed E1
Fractional E1
256K Compressed E1
Fractional E1
VCL-LD
E1 DCME
E1
E1
VCL-LD
E1 DCME
256K
256K
VCL-E1 DACS
256K Compressed E1
Fractional E1
VCL-LD
E1 DCME
VCL-E1 DACS
256K Compressed E1
Fractional E1
256K x “n”
Value of “n” = number of compressed E1’s
in Fractional E1 Format
E1
VCL-LD
E1 DCME
Copyright, Valiant Communications Limited - 2006
E1
VCL-LD
E1 DCME
Slide 10
VCL-LD, E1 Voice Compression Equipment
Front Panel View of VCL-LD
Power Supply
Card
Voice Compression
Cards
DS-0 Card
DS-0 Card
DS-0 Card
Voice Compression
Cards
Voice Compression
Cards
Echo Canceller
Card
E1 Interface
Card
19 inch Shelf
The detailed equipment components of the VCL-LD are listed below:
1.
2.
3.
4.
5.
6.
One, VCL-LD, 19 inch shelf and Connectorized Backpanel
One, -48 VDC, Power Supply Card
One, E1, Echo Canceller Card (128 ms. echo cancellation)
One, E1, Interface Card, provides one uncompressed E1 interface and one compressed E1 interface.
DS-0, aggregate 10 compressed voice channels to a DS-0 (3 cards per system - maximum)
Voice compression card, Dual channel voice compression card, (15 cards per system - maximum)
Copyright, Valiant Communications Limited - 2006
Slide 11
VCL-LD, E1 Voice Compression Equipment
Technical Specifications
Digital Network (PSTN) Interface 2048 Kbps
Telco - E1
Number of E1 Interfaces
Maximum number of Voice
Channels per E1 Interface
Conformity
Frame Structure
PCM Sampling Rate
Encoding Law
Bit Rate
Code
Nominal Impedance
Pulse Mask
Output Jitter
Permissible Attenuation
2048 KHz to 3072 KHz
Jitter Tolerance
Supported Signaling
1
30
G. 703
As per ITU (CCITT) G.704
8000 samples / sec
A law as per ITU (CCITT) G.711
2048 Kbps ± 50 ppm
HDB3
120 balanced (75 unbalanced* - optional).
As per ITU (CCITT) Rec. G.703
< 0.05 UI (in the frequency range of 20Hz to 100Khz)
6 dB at 1 MHz
>14dB
As per ITU (CCITT) G.823
Channel Associated Signaling, R2 Signaling
PRI (Primary Rate) ISDN Signaling (Q.931), C7, SS7
Signaling.
Copyright, Valiant Communications Limited - 2006
Slide 12
VCL-LD, E1 Voice Compression Equipment
Technical Specifications
Clock Synchronization
Synchronization Sources
Default Option
Internal Clock, or, Timing derived from the
E1, HDB3 link (Loop-Timed Clock)
Internal Clock
Digital Carrier Interface 256 Kbps (Fractional E1) Compressed - E1
(voice only application)
Number of E1 Interfaces
Number of DS-0s
Conformity
Frame Structure
Bit Rate
Code
Nominal Impedance
Pulse Mask
Output Jitter
Permissible Attenuation
1 - Fractional E1 Interface @ 256Kbps
4 (First Four Time-Slots)
G. 703
G.704
2048 Kbps ± 50 ppm
HDB3
120 balanced (75 unbalanced - optional)
As per ITU (CCITT) Rec. G.703
< 0.05 UI (in the frequency range of 20Hz to
100 KHz)
6 dB at 1 MHz
Copyright, Valiant Communications Limited - 2006
Slide 13
VCL-LD, E1 Voice Compression Equipment
Technical Specifications
Digital Carrier Interface 256 Kbps (Fractional E1) Compressed - E1
(voice only application)
Return Loss at:
51.2 KHz to 102.4 KHz
102.4 KHz to 2048KHz
2048KHz to 3072 KHz
Jitter Tolerance
>12dB
>18dB
>14dB
As per ITU (CCITT) G.823
Digital Carrier Interface 384 Kbps (Fractional E1) Compressed - E1
(voice, fax & data modem support @ upto 33.6Kbps tramsmission)
Number of E1 Interfaces
Number of DS-0s
Conformity
Frame Structure
Bit Rate
Code
Nominal Impedance
Pulse Mask
1 - Fractional E1 Interface @ 384Kbps
6 (First Six Time-Slots)
G. 703
G.704
2048 Kbps ± 50 ppm
HDB3
120 balanced (75 unbalanced - optional)
As per ITU (CCITT) Rec. G.703
Copyright, Valiant Communications Limited - 2006
Slide 14
VCL-LD, E1 Voice Compression Equipment
Technical Specifications
Digital Carrier Interface 384 Kbps (Fractional E1) Compressed - E1
(voice, fax & data modem support @ upto 33.6Kbps tramsmission)
Output Jitter
Permissible Attenuation
Return Loss at:
51.2 KHz to 102.4 KHz
102.4 KHz to 2048KHz
2048KHz to 3072 KHz
Jitter Tolerance
< 0.05 UI (in the frequency range of 20Hz to
100 KHz
6 dB at 1 Mhz
>12dB
>18dB
>14dB
As per ITU (CCITT) G.823
Power Supply
Input DC voltage
Range of input
Power Consumption
-48VDC Input Voltage Reversal
Protection
Auto-Sensing
-48V DC ( nominal )
-40V to -60V DC
Less than 20 Watts (at full load)
Provided (Standard)
Optional (External Supply)
Copyright, Valiant Communications Limited - 2006
Slide 15
VCL-LD, E1 Voice Compression Equipment
Echo Cancellers - Technical Specifications
•
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Provides voice echo cancellation of up to 128ms
Conforms to ITU-T G.165 and ITU-T G.168
G.164 /G.165 disable tone detection
Non-Linear Processor with Comfort Noise Insertion
Narrow-Band Detector
Eliminates long echo tail.
Environmental
Cooling
Temperature
Natural, Convection cooling
0°C to 50°C, Ambient
Mechanical Dimensions
Rack Mounting
Height
Depth
Width
Weight (Net)
Standard 19 inch DIN rack
3U, 133.35mm
292mm
482mm
8.50 Kgs.
Copyright, Valiant Communications Limited - 2006
Slide 16
VCL-LD, E1 Voice Compression Equipment
Valiant’s Products
• Digital Access Cross Connects - E1/T1, E3, DS3,10/100BaseT Ethernet
• Groomers for Hi-Z Non-Intrusive Hi-Impedance Monitoring - E1, T1, STM-1
• Echo Cancellers & Voice Quality Enhancement Solutions - E1, T1,
DS3 and STM-1
• STM-1, STM-4 and STM-16 ADM SDH Multiplexers
• E1 Drop-Insert (Add-Drop) Voice and Data Multiplexers
• Ethernet Converters: E1, T1, E3, DS3, STM-1 (Ethernet over STM-1)
• E1 / T1 TDM over IP
• E1 PRI ISDN (Euro ISDN) Q.931 Multiplexers
• E1 Channel Banks
• E2 (4E1), 2/34 Mbps PDH Multiplexer, 34Mbps OLTE
• 1+1 APS (Automatic Protection Switching)
• Remote Site Monitoring Equipment
Copyright, Valiant Communications Limited - 2006
Slide 17
VCL-LD, E1 Voice Compression Equipment
Thank you for your attention
For more details visit us at our Website at
http://www.valiantcom.com
INDIA
U.S.A.
U.K.
Valiant Communications Limited
71/1, Shivaji Marg, New Delhi - 110015, India
Phone: +91-11 4105 5601, 91-11 4105 5602
Fax: +91-11 4105 5604, 91-11 2543 4300
E-mail: [email protected]
Website: http://www.valiantcom.com
Valcomm Technologies Inc.
4000 Ponce de Leon, Suite 470
Coral Gables, FL 33146
United States of America
E-mail: [email protected]
Website: http://www.valiantcom.com
Valiant Communications (UK) Ltd
1, Acton Hill Mews,
310-328 Uxbridge Road,
London W3 9QN, United Kingdom
E-mail: [email protected]
Website: http://www.valiantcom.com
Copyright, Valiant Communications Limited - 2006
Slide 18