E1
and T1 Automatic
Protection Switching Solutions: APS (1+1 Redundancy Switch)
Orion Telecom Networks Inc. offers the VCL-MegaConnect-Jr-APS
E1 redundancy
switch (each E1 Switch card) supports one E1 link, and upto 16, E1
links can be supported by a "pair" of E1 Protection Switching
Systems. Two E1 Protection Switching Systems are
required
(one at each end of the link) for implementation of 1+1 redundancy
solution.
One E1
Protection Switching System must be configured as "Master" and
installed at one end of the E1 link.
The
other E1 Protection Switching System must be configured as "Slave"
and installed at the corresponding far end of the E1 link.
Product Description
The VCL-MegaConnect-Jr-APS offers 16 E1 solution with APS (1+1
Automatic Protection Switching). This equipment is offered as an
integrated 19-Inch rack mountable 2U high box.
This product allows the user to design 1+1 (protected) redundant
E1 routes on similar (fiber-fiber) or complementing (fiber-radio)
transmission mediums. Additionally, it also allows the selection of
only the critical time-slots of the primary route to be re-routed on
the E1/T1 link on the redundant / standby route in the event of the
failure of the primary route, if the total carrying capacity of the
stand-by redundant route is smaller than that of the primary route.
For Example: This product shall allow the user to select and
specify the time-slots from multiple E1/T1 links in the "primary
route", which may be considered "critical" in nature and be
re-routed to the "redundant / standby route" of a smaller carrying
capacity, in the event of the failure of the "primary route".
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, AIS
(All-Ones AIS alarm condition), or excessive CRC-4 errors etc. As
stated above, the criterion for switching between the primary (main)
and the secondary (protected / standby) routes is user programmable.
Data transport on the E1s is transparent and protocol
independent.
Features & Highlights
Provides 1+1 E1 redundancy
link (active+standby) between any two complementing transmission
mediums
- Provides 1+1 E1 redundancy support
to higher order multiplexers eg. E2, E3
- System configuration & management
interface through "CLI" text based commands
- Transport A-bis Interface or E1s
- Provide 1 + 1 Protection Routing /
Path between BSC and BTS
- Provide following interfaces at
BSC / BTS Over E1 links
- E1 / A-bis Interface
- 10BaseT Ethernet Bridge
- RS-232 Async Serial (for site
monitoring)
- NO / NC Relay / Alarm Extensions
(Extend alarms originating on dry relay contacts)
- Optional - 128 ms Echo -
Cancellation and VQE features at BSC
- Maximize mobile operator service
availability and network resiliency through VCL-MegaConnect-Jr.
Path - Protection enabled facility
- These ensure that mission critical
voice, data, control and management traffic are properly supported
and maintained even during T1 / E1 backhaul facility outages. When
the working link fails, the protection link becomes active
- During normal Operation, VCL-MegaConnect-Jr
sends duplicate traffic across both the working and dedicated
protection E1 / T1 facilities while continuously maintaining the
performance of both links to determine which link shall be
utilized
- Through the comprehensive digital
access cross-connect and remote management capabilities integrated
within VCL-MegaConnect-Jr, backhaul T1 / E1 facilities can be
optimally groomed to reduce both Capital Expenditure and improve
Network reliability
- In the event of a failed or
degraded T1 / E1 link, the traffic is automatically transferred
from the previously working link to the duplicate protection link
in accordance with the predetermined operating parameter
programmed by the network operator
- During normal Operation, VCL-MegaConnect-Jr
APS passes independently traffic across both the working and
protection E1 / T1 facilities while continuously maintaining the
performance of both links to determine which to utilize for
critical traffic
- Traffic Protection
- Alternate Facility Advantages
- Service Differentiation Agreements
- Increased Network Reliability
Resilience
- Media and Path Diversity
- Remote Management
Benefits
Customer Relation
Competitive
Service Level
Back-haul Network
Technology Migration
1) User Programmable 1+1 Protection Parameters:
- Loss of Signal
- Loss of Frame
- Loss of Multi-Frame
- AIS
- Excessive CRC4 Violation
2) Critical Links / Critical Time-Slots:
Applications
Providing 1+1 alternate paths between any two
Transmissions mediums (active+standby). e.g:
- Fiber / Fiber
- Radio / Fiber
- Radio / HDSL
- Fiber / HDSL etc.
Applications
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