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Data
transported on the E1 Links is transparent and protocol independent.
VCL-SafeComm, 16 E1 Links (48 E1 Ports), 1+1 Automatic Protection
Switching Equipment -
Data Sheet
(.PDF)
VCL-SafeComm, 16 E1 Links (48 E1 Ports), 1+1 Automatic Protection
Switching Equipment -
Power Point Presentation
(.PPS)
Salient Features
- VCL-SafeComm 1+1 Protection Switch
does not "add" a point-of-failure to the E1 network.
- 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.
- 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:
- 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:
- 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:
- 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 EXTERNALL TRIGGER MODE are both
disabled and the manual commands over
ride all other modes.
Product
Application Note: 8/16 E1/T1 Links (24/48 E1/T1 Ports), 1+1 Automatic Protection
Switching Equipment: This equipment is to be used when the customer wants to use two
different E1/T1 links of the network to establish a 1+1 redundant path to ensure continued
E1/T1 service bewteen two points even if one of the network E1/T1 link fails. Example -
the customer may want to use E1/T1 Optical Fiber and an E1/T1 Radio link and to provide an
ACTIVE and a STANDBY link between a BSC and a BTS so that when the E1/T1 Optical Fiber
(ACTIVE) link goes down the STANDBY / REDUNDANT E1/T1 Radio link automatically gets
connected to provide continued connectivity and service between the BSC and the BTS.
Product
Application Note: The E1/T1 Fail-Over Switch should be used when the
customer is using a single E1/T1 link to provide protection equipment to the customers
premises by using one E1/T1 ACTIVE and one E1/T1 STANDBY equipment (such as a ROUTER or a
PBX). The E1/T1 Failover Switch shall automatically switch the E1/T1 that is being
received from the telephone company between the ACTIVE E1/T1 equipment and the STANDBY
E1/T1 equipment. Should the ACTIVE E1/T1 equipment go bad or be removed from service, the
E1/T1 link from the telephone company automatically gets switched to the STANDBY E1/T1
equipment without any customer or user intervention.
Example: The user may deploy the VCL-SafeComm, 16
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, 16 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
Providing 1+1 alternate paths
between any two Transmission mediums (active+standby). e.g:
- Fiber/Fiber
- Radio/Fiber
- Radio/HDSL
- Fiber/HDSL etc.
Application Diagrams
Features & Highlights
- High density protection switching
equipment (upto 16 E1 Links i.e. 48 E1 Ports)
- To provide an independent point-to-point,
protected E1 Link between two "E1 USER PORTS" on similar (example fiber-fiber),
or dissimilar (fiber-radio) mediums
- To provide 1+1 E1 redundancy support to
higher order multiplexers e.g. E2, E3
- System configuration and management
interface through "CLI" text based commands
- Transport A-bis Interface on redundant E1
links
- Provide 1+1 Protection Routing / Path
between BSC and BTS
- 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
- Through the comprehensive remote
configuration and alarm management capabilities of the VCL-SafeComm, 16 E1, 1+1 Automatic
Protection Switching Equipment the product may be used to improve network reliability and
control
- Traffic Protection
- Alternate Facility Advantages
- Service Differentiation Agreements
- Increased Network Reliability Resilience
- Media and Path Diversity
- Remote Management
- Alarm logging and monitoring.
Salient Feature
Benefits
- Customer Relations
- Competitive
- Service Level
- Back-haul Network
- Technology Migration
- User Programmable 1+1 Protection Parameters:
- Loss of Signal
- AIS (All Ones Alarm)
Technical
Specifications
E1 Interface
Number of
Interfaces |
Total 48 E1
interfaces
16 for Main E1 Links.
16 for Primary E1 Links.
16 for Secondary E1 Links. |
| Line Rate |
E1 – 2.048 Mbps |
| Line Code |
HDB3 |
| Frame Structure |
G.704 |
| Bit Rate |
2048 Kbps ± 50 ppm |
| Jitter Tolerance |
As per ITU-T G.823 |
| Output Jitter |
< 0.05 UI (in the frequency
range of 20 Hz to 100 Khz) |
| Pulse Mask |
As per ITU (CCITT) Rec. G.703 |
| Conformity (electrical) |
G.703 |
| Nominal Impedance |
120 Ohms, balanced |
Security and Password Features
System Access, Control and Management Options:
·
Telnet
·
SSH
·
CLI Control Interface (HyperTerminal or VT100)
·
SNMP V2 Traps (MIB File provided)
·
Windows based GUI (Graphical User Interface) for easy
configuration, management and access. Ability to monitor multiple
units from a single NMS.
OAM:
Operation and Management Ports
·
RS232 Serial Port
·
USB COM Port
·
10/100BaseT Ethernet for remote access.
Security and Protection
·
Secured Access via SSH V2
·
Password Protection: Password Protection in compliance with the
mandatory clauses of the GR-815-CORE-2 specifications for secured
access control.
·
Logging: Maintains a log of all successful and un-successful
attempts.
·
Logged information includes the ID and the IP address of the
accessing entities.
·
Alerts the administrator if the un-successful logging attempts
exceed three.
·
Security Audit: All access logs for up to 30 days are maintained
for security audit purposes.
·
Security log entry of any request or activity including that
user-ID (including IP address, if applicable), to establish user
accountability
·
Report Generation / Audit Trail
·
Security Administration.
Management and Monitoring
·
RS232 serial, USB serial interfaces for local terminal access.
·
10/100BaseT Ethernet Interface for remote access over an IP
network.
·
Encrypted Password Protection.
·
Telnet – Remote access over IP links.
·
SSH – Secured remote access using Secure Shell Protocol over IP
links.
·
SNMP Traps and NMS for real time remote monitoring and management
over an IP network.
·
Automatic Link Test feature link testing at user programmable
periodical intervals.
·
Visual I/O status LED Display.
Clock
Transparent between the two points of the E1 Links.
Management and Control
Serial Management Port (RS232) - COM Port
10/100 BaseT for Remote Management over a LAN
10/100 BaseT Telnet over a TCP-IP Network
Specification
and Regulation Compliance
Meets CE requirements
Complies with FCC, Part 68 and Part 15 subpart A
specifications
Safety - UL 1459 Issue 2
Command
Language
Command Line Interface (English text commands)
Alarm Contact Closures
1 Alarm Relay,
Type - Form "C" relay
Temperature
Operating 00C to 500C
Humidity 5% to 95% non-condensing
Dimensions
and Weight
| Rack mounting |
Standard 19-Inch. DIN Rack |
| Height |
44.00 mm. |
| Depth |
260.00 mm. |
| Width |
477.00 mm. |
| Weight |
4.00 kg. |
AC Power Supply
Specifications
| Output voltage of AC Adapter |
100 - 240 Volt AC |
| Range of input AC voltage |
100 V to 240 V AC, 50Hz / 60Hz. |
| System input voltage |
7.5 V DC to 9.0 V DC, DC input
polarity protection. |
| Maximum full load output current |
2.5 A at 7.5 V DC/9.0 V DC |
| Input voltage reversal protection |
Provided in the Card |
| Efficiency at full load |
>86% |
DC Power Supply Specifications
| Input DC voltage |
- 48V DC (nominal) |
| Range of input voltage |
- 40V to - 60V DC |
| System voltage |
+ 3.3V |
| Input voltage reversal protection
|
Provided in the Card |
| Short circuit protection |
Provided |
| Power Consumption |
< 10W |
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