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VCL-SafeCommTM, 8 E1 Links (24 E1 Ports)
(1+1 Automatic Protection Switch)
Product Description
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Orion Telecom Networks Inc. offers the VCL-SafeComm, 8 E1 Links (24 E1
Ports), 1+1 Automatic Protection Switching (APS) Equipment may
be used to protect upto 8 E1 Links (24 E1 Ports), and provide an alternate communication route to each E1
Link between any two E1 points.
In the event of the failure of
the primary (Main) E1 communication route, the VCL-SafeComm, 8
E1 Links (1+1 Automatic Protection Switching Equipment)
automatically switches the E1 traffic to a secondary (standby)
E1 route. The VCL-SafeComm, 8 E1, 1+1 Automatic Protection
Switching equipment is available in a 2U high chassis which may
be mounted in any DIN standard,19-Inch rack. |
This product allows the
user to design 1+1 (protected) redundant E1 routes on similar
(fiber-fiber), or complementing (fiber-radio) transmission mediums.
The criterion for switching between
the primary (main) and the secondary (protected/standby) routes is
user programmable.
Criterion for switching between the
primary (main) and the secondary (protected/standby) routes may be
Loss-Of-Signal on E1 links, or AIS (All-Ones AIS alarm) condition.
The criterion for
switching time and recovery time between the primary (main) and the
secondary (protected/standby) routes is user programmable (10ms to
3000ms).
E1 recovery switching time from Standby Link to Main Link is also
user programmable from 10ms to 9999ms. Data transported on the E1
Links is transparent and protocol independent.
Salient
Features:
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VCL-SafeComm 1+1
Protection Switch does not "add" a point-of-failure to the E1
network.
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Even in the event that the power to the
VCL-SafeComm 1+1 Protection Switch (or
the equipment itself) fails, the E1 link connectivity shall be
"always" maintained." The E1 link integrity is ALWAYS maintained
(the switch reverts the connection to the primary E1 link), even
if the power to the equipment is disconnected and removed. This
ensures that the E1 link connectivity is never lost.
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VCL-SafeComm 1+1
Protection Switch provides two power inputs and this allows the
user to connect the switch to two separate independent - 48V DC
power sources to minimize the chances of any power failure
occurring due to power outage.
Modes of
Operation:
There are three modes in which the
VCL-SafeComm E1, 1+1 Automatic Protection Switch can be configured
to operate in:
AUTOMATIC SWITCHING MODE:
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The VCL-SafeComm E1, 1+1 Automatic Protection
Switch can be configured to operate in an AUTOMATIC SWITCHING
MODE. In the automatic mode, the switch
shall automatically switch and re-route the E1 circuits from the
MAIN route to the STANDBY route if there is an AIS or a
LOS (LOSS OF SIGNAL) alarm, on the MAIN E1 link route.
Similarly, in the automatic mode the switch shall automatically
switch back and re-route the E1 circuits from the STANDBY
route to the MAIN route upon the
restoration of the service on the MAIN E1 link route.
All switching parameters and link restoration parameters are
user programmable.
EXTERNAL TRIGGER SWITCHING MODE:
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Sometimes the user wants to switch the E1
circuits between the MAIN route and the
STANDBY route when some external event
occurs. In the EXTERNAL TRIGGER MODE the user can switch between
the MAIN E1 route and the STANDBY E1
route when an external trigger (such as
an closed/opened physical contact) is applied to the switch. This
feature was added to make it compatible
with certain radios equipment suppliers,
where they apply an external trigger to
switch and re-route the E1 circuits between their main E1 radios
and standby E1 radios.
MANUAL SWITCHING MODE:
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In Manual Switching Mode,
the user shall use manual Telnet commands to
switch the E1 circuits between the MAIN route and the
STANDBY route, manually, using Telnet
commands. In this mode the AUTOMATIC
MODE and the EXTERNAL TRIGGER MODE are both disabled
and the manual commands over ride all other modes.
Applications
Providing 1+1 alternate paths
between any two Transmission mediums (active+standby). e.g:
- Fiber/Fiber
- Radio/Fiber
- Radio/HDSL
- Fiber/HDSL etc.
Example:
The user may deploy the VCL-SafeComm, 8 E1, 1+1 Automatic
Protection Switching Equipment to provide an alternate communication
route between an optical fiber link and a radio link between any two
points. In the event of the failure of the primary (optical fiber)
link the E1 is automatically switched to the alternate route over
the E1 radio, thus ensuring maximum uptime on all such 1+1 protected
E1 Links.
Once the primary (optical fiber) E1
Link on the optical fiber is restored, the VCL-SafeComm, 8 E1, 1+1
Automatic Protection Switching Equipment automatically restores the
communication to the primary (optical fiber) E1 Link. The switching
and restoration criterion is user programmable.
Applications
Diagrams
Features & Highlights
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High density
protection switching equipment (upto 8 E1 Links i.e. 24 E1 Ports)
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To provide an
independent point-to-point, protected E1 Link between two "E1 USER
PORTS" on similar (example fiber-fiber), or dis-similar
(fiber-radio) mediums
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To provide 1+1 E1
redundancy support to higher order multiplexers e.g. E2, E3
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System configuration and management interface through "CLI" text based
commands and GUI (Graphical User Interface)
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Transport A-bis
Interface on redundant E1 links
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Provide 1+1
Protection Routing / Path between BSC and BTS
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These ensure that
mission critical voice, data, control and management traffic are
properly supported and maintained even during E1 backhaul facility
outages. When the primary (working) link fails, the E1 traffic is
automatically switched to the standby (secondary) link to ensure
maximum uptime
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Through the
comprehensive remote configuration and alarm management
capabilities of the VCL-SafeComm, 8 E1, 1+1 Automatic Protection
Switching Equipment the product may be used to improve network
reliability and control
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Traffic Protection
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Alternate Facility
Advantages
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Service
Differentiation Agreements
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Increased Network
Reliability Resilience
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Media and Path
Diversity
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Remote Management
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Alarm logging and
monitoring.
Benefits
Customer Relations
Competitive
Service Level
Back-haul Network
Technology Migration
User Programmable 1+1 Protection
Parameters:
- Loss of Signal
- AIS (All Ones Alarm)
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