|
 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.Data transported on the E1 Links is
transparent and protocol independent.
VCL-SafeComm, 8 E1 Links
(24 E1 Ports), 1+1 Automatic Protection Switching Equipment - Data Sheet (.PDF)
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 STANBY / REDUNDANT E1/T1 Radio link automatically gets
connected to provide continued connectivity and service between the BSC and the BTS.
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.
Features & Highlights:
High density protection switching
equipment (upto 8 E1 Links i.e. 24 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, 8 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.
Benefits:
Customer Relations
Competitive
Service Level
Back-haul Network
Technology Migration
User Programmable 1+1 Protection Parameters:
a) Loss of Signal
b) AIS (All Ones Alarm)
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.
Application Diagrams:
 
Technical Specifications:
E1 Interface
Number of
Interfaces |
Total 24 E1
interfaces
8 for Main E1 Links.
8 for Primary E1 Links.
8 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 |
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% |
| 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 |
|
|
