Valiant's T1 DCME Voice Compression equipment with T1 echo cancellers

VCL-LD, T1 DCME Voice Compression Equipment with T1 echo cancellers

Product Overview Features Highlights
Data Sheet (.PDF) MS Power Point (PPS)
Application Diagrams
Voice Quality Statement

Valiant's VCL-LD™ T1 DCME Voice Compression equipment provides 24, toll-quality, very clear and sharp, voice channels using an 6:1 compression ratio. Also available with fax and data modem support @ 33.6Kbps data rates. This is accomplished using an advanced, DSP based Viterbi decoder with automatic Voice / Silence detection (VAD) and adaptive comfort noise (CNG) generation.

The VCL-LD, T1 DCME has an in-built T1 Echo Canceller (128ms. echo cancellation card).

Applications diagrams

Cellular Network applications	Long Distance Telephony 1	Long Distance Telephony 2
Pre-Paid Calling Card Services	Between Two Switches	Payphone applications

The interface to the local PSTN Network is ITU-T, G.703, G.704 compliant T1 with Signaling support for PRI ISDN Signaling, C7 and SS7 Signaling.

Voice Quality statement for the VCL-LD™ Equipment using 6:1 compression technology, for providing better voice quality than G.729, G.726 and GSM technology.

VCL-LD, T1 DCME is a natural choice for Long Distance Telephony Service Providers (including Pre-Paid Calling Card Operators), Cellular Operators, Corporate Customers, Call-Center Operators wanting to optimize on expensive bandwidth usage and offer a competitively priced, toll-quality service to their customers.

Features

Support for Multiple Signaling Platforms including PRI ISDN, C7 and SS7 Signaling.
T1, 24 voice channels in 256Kbps bandwidth (4, DS-0's for voice only applications).
T1, 24 voice channels in 384Kbps bandwidth (6, DS-0's for voice, fax and data modem support applications.
Ideal choice for Long-Distance Telephony (including Pre-Paid Calling Card Operators), Cellular Operators, Corporate Customers, National and International Call-Center Applications, and ISPs provide long distance telephony.

Highlights

T1, 24 Toll-Quality voice channels
In-built Echo Cancellation (128ms.) card.
Supports fax and data modems @ up to 33.6Kbps data rates.
Advanced FEC (Forward Error Correction) for IP links
DSP based Vertibi Decoder for superior voice quality.
6:1 compression ratio.
3U high, compact construction.
Synchronization user selectable clock sources (Priority Selection of Clock Sources).
Modular Architecture - reduces downtime.

Mechanical Specifications & Weight
Rack Mounting	Standard 19 inch DIN rack
Height	3U (133.22 mm)
Depth	260 mm
Width	477 mm
Weight	8.00 Kgs.