| Bhumika's
intelligent E1 Channel Bank, VCL-CB-INT™ provides Voice Activity
Detection (VAD) activated "answer supervision" and "disconnect
supervision" to connect VoIP, VoFR and VoATM networks to analog
PSTN (POTS) lines that do not provide any type of answer
supervision / battery reversal functions.
The interface to the
analog
|
 |
| PSTN (POTS*) lines have been ruggedized to provide complete
protection against line card failures which occur from induced
voltages from AC power lines and lightening strikes and difficult
field conditions. |
The intelligent E1 channel
bank can be used for VoIP, VoFR and VoATM network communications that
will terminate traffic directly to the analog PSTN lines. The channel
bank solution provides a cost-effective platform to convert upto 30
dial-up, analog (PSTN) voice circuits to a digital E1 interface to
connect to VoIP, VoFR and VoATM Gateways.
Bhumika's years of
experience in providing telecom transmission solutions to customers
worldwide, located in over 80 countries, has been build in to
providing a cost-effective - yet an intelligent E1 channel bank
solution.
The VCL-CB™ E1 Channel bank
offers all types of analog interfaces including FXO, FXS and 2W/4W E&M
interfaces, that may be required to connect to an E1 digital interface
of a VoIP, VoFR and VoATM Gateway.
The E1 Channel Bank shall interface to the E1 port of any Server /
Switch / VoIP Gateway / PBX using R2 CAS (R2 Digital) Signaling (R2
Channel Associated Signaling) as per ITU-T Q.421 / Q.422
recommendations, to connect up to 30 analog interfaces to an E1 port.
VCL-CB-INT™ E1, Channel Bank
Remote Access Server / VoIP Gateway Application
The cable plant of most
telecom service providers is not designed to deliver E1 services to
customers in most parts of the world. The VoIP Gateway / Switch /
Server / PBX with an E1 interface, thus, in such cases can only be
accessed through dial-up, 2 wire analog lines, the only available link
for connecting the Exchange (Central Office) to the Corporate PBX
Networks and VoIP Gateways.
Bhumika's VCL-CB™ intelligent E1 Channel Bank is especially useful in
countries, where the cable plant is not equipped to deliver digital E1
services to the customer, who are using the next generation access
equipment, which can only connect to an E1 interface.
The E1 Channel Bank solution is available in two versions:
| The
first E1 channel
bank VCL-CB-BR™ provides answer supervision when the called
party answers, upon receiving an actual battery reversal of the
PSTN analog line.
Both, the line connect and disconnect
functions are provided using the actual battery reversal function
of the PSTN analog line (e.g. much like your coin pay-phones).
Available with FXO, FXS and E&M interfaces |
The
second E1 Channel Bank VCL-CB-INT™ is an intelligent E1
Channel Bank that provides the metering function using Voice
Activity Detection (VAD) to provide voice activated "answer
supervision" and "disconnect supervision". The VCL-CB-INT™
intelligent E1 Channel Bank uses a sophisticated DSP algorithm to
"listen" to the PSTN line for "voice activity" and will provide
"answer supervision" information to initiate the metering process.
|
The VCL-CB-INT™ E1 Channel
Bank is available with FXO interfaces which shall connect to the
analog PSTN (POTS*) lines from the local Exchange / Telco / Switch.
* POTS: Plain Old Telephone Service.
|
Features |
Highlights |
- Used for terminating long distance
traffic on PSTN lines that "Support" or "Do Not Support"
"Battery Reversal / Polarity Reversal" (Answer Supervision).
- Uses sophisticated DSP algorithms
to provide Voice Activity Detection (VAD) to provide "Answer
Supervision" to initiate metering and "Disconnect Supervision"
feature to "Disconnect hung / stuck PSTN lines".
- Ruggedized equipment design.
- Provide complete protection
against the line card failures occurring from induced voltages
from AC power lines and lightening strikes and other difficult
field conditions.
- VF (Voice Frequency)
specifications are in accordance with G.712, ITU-T
recommendations to provide clear voice.
- Ideal for traffic termination for
corporate and ISP customers, who wish to connect their fully
digital networks to the PSTN, through the available analog
dial-up PTT lines.
|
- Ideal for connecting to PSTN.
- Also used in conventional
applications to deliver voice over an end-to-end E1 (radio /
fiber / HDSL) links.
- Available with FXO, FXS and 2W/4W
E&M customer interfaces.
- Compliance to all the relevant ITU-T
recommendations.
- Modular, 3U high, compact
construction provides easy maintenance.
- Plug & Play - easy to install
equipment.
- Extensive set of alarms
- Available with easy to use
Windows™ based Graphical User Interface.
- Synchronization to different user
selectable clock sources.
- Remote Access through TCP/IP (for
remote configuration and monitoring - available as an optional
extra).
- Available with an E1, 2Mbps
interface or a fractional E1 interface (to even start service
with less than 10 lines).
|
Ordering Information for VCL-CB-INT™
intelligent E1 Channel Bank
|
Core System Composition: (Common Equipment) |
Part # |
|
19-Inch Chassis with connectorized
backpanel |
VCL-CB-000 / 005 |
|
-48VDC Power Supply Card
|
VCL-CB-010 |
|
E1 Interface Card (Control Card) |
VCL-CB-015-INT |
|
User Interface
Cards: |
| FXO
(Central Office Interface Card) |
VCL-CB-030-INT |
Notes:
FXO interface cards - connect to the
analog PSTN (telco) lines.
FXS interface cards - connect to analog telephone sets.
E&M interface cards - connect to E&M switches / interfaces. |
