|
See also: PDF version
A wireless telephone service provider was looking for an affordable solution
to connect Nortel cellular switches over long distances. Nortel Networks’s cellular
switches are only available with multimode
fiber interfaces. These interfaces are used to connect their switches in a
Central Office to a MicroCell switch in a Base Transmit Station, where the
cellular antennas are located. This works well in densely populated areas
where the Base Transmit Stations are located relatively close, within 2 km,
to the Central Office. The wireless service
provider wanted to offer their services in rural areas. But the number of
potential customers in these sectors didn’t justify the large capital
expenditures required to install additional Central Offices and Base Transmit
Stations. What they needed was a solution to connect the Base Transmit
Stations back to their Central Office over distances greater then the
multimode cable could handle. Single mode fiber cable
has the bandwidth capabilities to transmit signals over the distances
required by the service provider. By utilizing Transition
Networks’s® single mode to multimode 622Mbps converters, they were
able to use single mode fiber cable to connect the Base Transmit Stations
located up to 60km from the Central Office. The Transition Networks solution
has allowed the service provider to save time and money in their network
deployment, and reduced the hardware requirements to provide wireless
services to customer in these remote cellular sectors. In the diagram, Transition
Networks’s 13-slot Point System Chassis, housing several single mode to
multimode converters, was mounted in the same rack as the Nortel Cellular
switch. Short multimode patch cables connected the switch to the media
converters. Next the converters were connected to the single mode fiber
installed between the central office and the various Base Transmit Stations
located throughout the rural areas where the service provider wanted to offer
their wireless services. Within each Base Transmit Station, a Transition
Single Slot chassis and another media converter was installed to make the
final connection to the Nortel MicroCell Switch which interfaces with the
antennas. The single mode to
multimode converters offered by Transition Networks are not protocol
specific, but are based on the data transmission speed. In this example, the
Nortel equipment uses a proprietary protocol, which transmits at 634 Mbps and
the Transition Networks converters were able to work with that data rate.
Transition also offers similar converters designed to work in Fast Ethernet
(100Mbps) and Gigabit Ethernet (1000Mbps) environments. 
(+)
Transition Networks is the
leader in media conversion technology; offering a wide array of products
including Ethernet, Fast Ethernet (FX and SX), Gigabit Ethernet, 10/100 rate
converters, T1/E1, DS3, OC3, OC12, RS485, V.35, Token Ring and more. Our
Point System chassis provides users with manageability, reliability, and
future proofing. The Point System offers fully SNMP compliant read/write
software including web-based management. The chassis also provides for
redundant management, redundant power (AC or DC), converters that can be
upgraded in the field, and more. Please contact Transition Networks for more
information and how we may be able to help you deliver data services to your
customers.
|
