by November 4, 2006 0 comments

A midspan is a device that injects electric power into the unused 4 pairs of
CAT5 cables to send power over Ethernet to devices requiring that power. Also,
one should never connect non-PoE devices to ports that carry PoE current as they
can be destroyed. The PowerDsine 6548 is the first 48-port solution that comes
in a unique layout featuring ports of both PoE as well as non-PoE types (48
ports of each). The midspan also features automatic detection of the PoE-ness of
a remote connected device. The PowerDsine 6548 can power CAT 5, 5e and CAT6

If you have a large VoIP deployment (or are planning one), this midspan can
save you the headache of having to provide for so many electrical outlets for
your IP phones. All you require to do now is connect those IP phones to this
midspan. This also gives you the advantage of needing only one UPS to
power-backup all your IP phones. 

Price: Rs 78,000 (lifetime warranty)
Meant For: Enterprises
Key Specs: 96 ports for PoE and non-PoE devices, 1U form factor, Web-based mgmt
Pros: Compact, can also detect non-PoE devices
Cons: None
Contact: PowerDsine, MumbaiTel: 65529031E-mail: 
RQS# E63 or SMS Buy 131163 to 6677

Although there have been other midspans in the market before this, the 6548
is the first 48-port model. Other applications include powering up network
cameras and WLAN routers. This lets you do large-scale deployments fairly
quickly. Also, it comes in a 19” 1U rack mountable form factor making it easy
to put it in your server or router closet.

The console port of the midspan is an RJ45 port, which needs to be connected
using an RJ45-RS232 cable to a machine’s COM port before it can be accessed
over Telnet for initial and low-level configuration. The same port can then be
connected using a cross-cable to a machine for access using a Web-based UI for
detailed configuration and management.

PowerDsine 6548 comes in a unique layout, with the power control and ports in
two blocks. The block with the ports has 48 ports each along the outside and
inside edges. The ports on the outside are the PoE ports and those on the inside
are non-PoE. Each of these ports has an LED indicator. These LEDs let you
monitor the midspan in real-time network monitoring through the front panel
itself. You can also find out if there are over-load or short-circuit conditions
from these LEDs.

Advanced power management available in the 6548 midspan lets you control the
power transmitted over each port, especially when working under conditions where
available power (from the outside) is at a premium. Finally, the entire midspan
functionality can be managed remotely using a Web browser, as long as you are on
the same local network as the midspan. For this, there is a built in Web server.

Bottom Line: It’s a compact and cost effective way to manage PoE and
non-PoE devices, and its 96 ports give you ample scope to expand your network.


CyberMedia Labs

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