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E1 Failover (E1 Automatic Protection) Switch
Product Overview – E1
Protection (Failover) Switch - 4 E1 Links (12 E1 Ports)
 Valiant's E1 Fail-Over (E1 Protection) Switch (12 E1 Ports - 4
Links) allows the user to connect a single E1 line from the telephone company to an
"active", as well as to a "standby" E1 terminal, such as data server /
router etc. at the customer premises.
How it works:
In the event of the failure of the data server / router connected to the "A /
active" port of the E1 Protection (Fail-Over) Switch, it shall automatically switch
and connect the E1 line from the telephone company to the data server / router on the
"B / standby" port. This ensures minimum downtime - which would have otherwise
occurred due to equipment failure connected to the "A / active" port.
This equipment may be used to enhance the reliability and the efficiency of the customer's
data network.
Features:
- Allows the user to connect an E1 line from the Telephone
Company and to switch it automatically between an "active" and a
"standby" E1 terminal at the customer premises. The user programmable switching
criterion may be Loss Of E1 Signal, AIS and Loss Of E1 Frame.
- Can accomodate upto four E1 lines - may be used switch
between "active" and "standby" E1 terminals connected to upto four (or
fewer) E1 lines.
- Independent switching for each of the four E1 lines.
- User programmable switching criterion - independent for each
E1 line.
- Built-in real-time clock / real-time logging maintains a
history of all events.
- Remotely accessible over a TCP-IP networks. Allows the user
to access and carry out maintenance, or / and switch the E1 line(s) between the
"active" and "standby" E1 terminals, remotely, if required.
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Benefits:
Allows the users to install and maintain
active/standby/duplicate customer premises data networks/data servers, without bearing the
recurring $$ expense of leasing additional expensive E1 lines from the telephone company.
Automatically switches the E1 line from the Telephone
Company between the "active" and "standby" E1 equipment at the
customer premises, according to the customer-programmed criterion.
Improves equipment and data security.
Allows the user to co-locate the "backup /
standby" equipment in a different room/building and prevent any data loss arising out
of conditions of natural calamity such as fire, flooding etc.
Increases the reliability of the customer's data/IT networks
without having to bear the recurring and additional cost of leasing additional E1 lines
from the telephone company. The equipment may be used to create secondary/backup systems
at the customer premises to provide virtually uninterrupted service.
Application Note: The E1 Fail-Over Switch
should be used when the customer is using a E1 line to connect to and install
"active" E1 equipment and "standby" E1 equipment (such as a ROUTER or
a PBX) at the customers premises.
The E1 Failover Switch shall automatically switch the E1 line from the telephone company
between the ACTIVE E1 data server / router and the STANDBY E1 data server / router. Should
the ACTIVE E1 data server / router fail or be removed from service, the E1 line from the
telephone company automatically switches to the STANDBY E1 data server / router without
requiring any customer or user intervention.
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.
Applications:
- User programmable criterion for switching between
Active and Standby E1 Links at the customers premises:
| Loss Of E1 Signal (LOS) |
The Loss of Signal condition in a
E1 may occur due to: a) The failure of the E1 Port of
the customer premises equipment.
b) Or due to loss of power to the customer premises
equipment.
c) Or due to the disconnection of the E1 cable between the
protection Switch and the E1 Port of the customer premises equipment.
The cause of LOF is framing error.
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| Loss Of Frame (LOF) |
This Alarm is also known as Blue
Alarm. This Alarm indicates unframed all ones being detected in the incoming signal on the
receiver of E1 Protection Switch. |
| Alarm Indication Signal
(AIS) |
This Alarm indicated that E1 link
has occured.
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| Remote Alarm (RA) |
When Framed: Alternating eight
ones/eight zeros have been detected in the Datalink. A Yellow Alarm is typically
transmitted to indicate a failure on the receive side of the Failed end.
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| CRC ERROR |
This parameter is the number of
CRC-6 errors (Cyclic Redundancy Check Errors) that occurred during the test period. CRC-6 errors are only counted while the Telco E1 framing is selected
as (Extended Superframe). The CRC-6 can be monitored either on In-Service or
Out-of-Service E1 Spans. Since the expected value of the CRC pattern can be anticipated,
the received data can be compared to the expected results. Whenever the expected value
does not equal the actual value a CRC error event is counted. |
Technical Specifications
Network Interface
| Number of Interfaces |
4 Telco E1 Links (common
link/Telco E1s) 4 Active E1 Links (for Equipment-A)
4 Standby E1 Links (for Equipment-B) |
| Line Rate |
E1 - 2.048 Mbps
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| Line Code |
HDB3
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| Frame Structure |
As per ITU-T G.704 / or Un-Framed
E1 (User Selectable)
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| Bit Rate |
2048 Kbps ± 50 ppm
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| Jitter Tolerance |
As per ITU-T G.823
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| Output Jitter |
< 0.05 UI (in the frequency
range of 20 Hz to 100 KHz)
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| Nominal Line Impedance |
120 Ohms Balanced RJ-45
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| Nominal Pulse Width |
244 ns
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| Pulse Mask |
As per ITU (CCITT) Rec. G.703
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| Loss and recovery of frame
alignment |
As per clause 3 of ITU (CCITT)
G.732
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| Loss and recovery of multiframe
alignment |
As per clause 5.2 of ITU (CCITT)
G.732
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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% |
NMS (with Telnet) XPort Specifications
| Network Interface |
RJ-45 Ethernet 10BaseT or
100BaseT-TX (auto sensing) |
| Compatibility |
Ethernet Version 2.0 IEEE802.3 |
| Protocols Supported |
ARP, UDP/IP, TCP/IP, Telnet,
ICMP, SNMP, DHCP, BOOTP, TFTP, Auto IP, SMTP and HTTP |
| LEDs |
10Base-T and 100Base-TX Activity,
full/half duplex |
| Management |
Internal web server, SNMP (read
only), Serial login, Telnet login |
| EMI Compliance |
- Radiated and conducted
emissions - complies with Class B limits of EN55022:1998
- Direct and Indirect ESD - complies with EN55024:1998
- RF Electromagnetic Field Immunity - complies with EN55024:1998
- Electrical Fast Transient/Burst Immunity - complies with EN55024:1998
- Power Frequency Magnetic Field Immunity complies with EN55024:1998
- RF Common Mode Conducted Susceptibility complies with EN55024:1998 |
Mechanical Specifications
| Rack mounting |
Standard 19-Inch. DIN
Rack |
| Height |
44.00 mm |
| Depth |
260.00 mm. |
| Width |
477.00 mm. |
| Weight |
4.00 kg. |
Management Ports (COM Port)
Serial Port: 9.6Kbps (Async).
ASCII/VT100/HyperTerminal
10BaseT Ethernet: Telnet
Command Language
Command Line Interface (English text commands)
Temperature
| Operating |
00C to 500C |
| Humidity |
5% to 95% Non-Condensing |
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