| Author |
Message |
ethenator
Guest
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 Posted:
Mon Apr 11, 2005 4:35 pm Post subject:
Ethernet to OC-3 Extender |
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I'm looking for lo-cost devices that will take Ethernet from one side
and send it over an OC-3 circuit to another such device on the other
side. Specifically I am looking for a device that has a non-copper
Gig-E port on it so that you can get as much of the OC-3 bandwidth as
possible. Most devices I've seen have a copper 10/100 port and only
work to 100Mbps. I know that RAD has a new device (the RIC155GE) and
it's the first one I've seen but I'm wondering if anyone has come
across anything else. Low-cost and simplicity are key, as extra 10/100
ports and TDM ports and other things on the box only add to the expense
(though SNMP management is needed). |
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Guest
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| Posted:
Wed Apr 13, 2005 4:38 am Post subject:
Re: Ethernet to OC-3 Extender |
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ethenator wrote:
| Quote: | I'm looking for lo-cost devices that will take Ethernet from one side
and send it over an OC-3 circuit to another such device on the other
|
Howdy,
How many dollars does low-cost mean to you? Everyone has a different
pain threshold, and it usually depends on volume.
| Quote: | side. Specifically I am looking for a device that has a non-copper
Gig-E port on it so that you can get as much of the OC-3 bandwidth as
|
Are you wanting fiber based GbE because the thing you are connecting to
is fiber based? Or because you believe it would be cheaper or give you
more bandwidth?
Besides the RIC-155GE, I don't see anything else out there, but I'll
keep an eye out.
Regards,
Marc |
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stephen
Guest
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| Posted:
Wed Apr 13, 2005 9:27 pm Post subject:
Re: Ethernet to OC-3 Extender |
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"ethenator" <Pat.Smear@gmail.com> wrote in message
news:1113237338.429003.164180@l41g2000cwc.googlegroups.com...
| Quote: | I'm looking for lo-cost devices that will take Ethernet from one side
and send it over an OC-3 circuit to another such device on the other
side. Specifically I am looking for a device that has a non-copper
Gig-E port on it so that you can get as much of the OC-3 bandwidth as
possible. Most devices I've seen have a copper 10/100 port and only
work to 100Mbps. I know that RAD has a new device (the RIC155GE) and
it's the first one I've seen but I'm wondering if anyone has come
across anything else. Low-cost and simplicity are key, as extra 10/100
ports and TDM ports and other things on the box only add to the expense
(though SNMP management is needed).
|
might not fit your definition of "cheap", but have a look at some of the
recent SDH muxes - Axxessit is one we are using.
modular, 1U high SDH mux - they can take STM / SDH links at speeds from OC-3
/ STM-1 upwards, and 10/100 or Gig Ethernet ports.
Regards
Stephen Hope - return address needs fewer xxs |
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Robert Redelmeier
Guest
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| Posted:
Wed Apr 13, 2005 11:39 pm Post subject:
Re: Ethernet to OC-3 Extender |
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ethenator <Pat.Smear@gmail.com> wrote:
| Quote: | I'm looking for lo-cost devices that will take Ethernet from
one side and send it over an OC-3 circuit to another such device
on the other side. Specifically I am looking for a device that
has a non-copper Gig-E port on it so that you can get as much of
the OC-3 bandwidth as possible.
|
Why do you think that fiber Gig-E is any better than copper Gig-E,
or that either is remotely necessary to feed a 45 Mbit/s link?
I presume you want good performance for your users, and
that's a lot more than bandwidth. Latency matters.
You need good routers that do QoS (Quality of Service) to
prioritize some packets (queue jump). You request low cost,
so I'd steer you to the Linux Router Project where you can
reuse an old PC.
-- Robert |
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Manfred Kwiatkowski
Guest
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| Posted:
Thu Apr 14, 2005 9:36 am Post subject:
Re: Ethernet to OC-3 Extender |
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In article <p4i7e.959$JJ2.724@newssvr12.news.prodigy.com>,
Robert Redelmeier <redelm@ev1.net.invalid> writes:
| Quote: | ethenator <Pat.Smear@gmail.com> wrote:
I'm looking for lo-cost devices that will take Ethernet from
one side and send it over an OC-3 circuit to another such device
on the other side. Specifically I am looking for a device that
has a non-copper Gig-E port on it so that you can get as much of
the OC-3 bandwidth as possible.
Why do you think that fiber Gig-E is any better than copper Gig-E,
or that either is remotely necessary to feed a 45 Mbit/s link?
|
Probably because OC-3 is 155 Mbit :-)
| Quote: |
I presume you want good performance for your users, and
that's a lot more than bandwidth. Latency matters.
You need good routers that do QoS (Quality of Service) to
prioritize some packets (queue jump). You request low cost,
so I'd steer you to the Linux Router Project where you can
reuse an old PC.
|
Well I don't know of SDH/PoS PC-cards that would qualify
not as experimental.
Another option would be a used router with a PoS module
but I cannot say anything about prices.
--
Manfred Kwiatkowski kwiatkowski@zrz.tu-berlin.de |
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Robert Redelmeier
Guest
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| Posted:
Thu Apr 14, 2005 2:07 pm Post subject:
Re: Ethernet to OC-3 Extender |
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Manfred Kwiatkowski <kwia4000@bronto.zrz.tu-berlin.de> wrote:
| Quote: | Probably because OC-3 is 155 Mbit :-)
|
Oops. My bad. Filling that pipe won't be easy.
The standard PC PCI bus is bursts at 1064 Mbit/s, but
short bursts and setup unusally limit it to around 300.
-- Robert |
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Will
Guest
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| Posted:
Tue Apr 19, 2005 8:20 am Post subject:
Re: Ethernet to OC-3 Extender |
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I believe the Extreme BlackDiamond has an unusual board that will inverse
multiplex any ethernet traffic on the switch to four OC3s.
The board isn't low cost however.
--
Will
"ethenator" <Pat.Smear@gmail.com> wrote in message
news:1113237338.429003.164180@l41g2000cwc.googlegroups.com...
| Quote: | I'm looking for lo-cost devices that will take Ethernet from one side
and send it over an OC-3 circuit to another such device on the other
side. Specifically I am looking for a device that has a non-copper
Gig-E port on it so that you can get as much of the OC-3 bandwidth as
possible. Most devices I've seen have a copper 10/100 port and only
work to 100Mbps. I know that RAD has a new device (the RIC155GE) and
it's the first one I've seen but I'm wondering if anyone has come
across anything else. Low-cost and simplicity are key, as extra 10/100
ports and TDM ports and other things on the box only add to the expense
(though SNMP management is needed).
|
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ethenator
Guest
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| Posted:
Wed Apr 20, 2005 11:42 pm Post subject:
Re: Ethernet to OC-3 Extender |
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Gigabit Ethernet is needed to make full use of the available OC-3
bandwidth. With framing overhead and management you should be able to
get around 145 Mbps.
As for fiber versus copper, fiber is preferable since we have almost
all fiber-based GigE ports in our switches so it saves the added cost
of the media converter. Pandatel has a copper-based GigE/OC-3 box, but
they are an obscure international company that makes it difficult for
us to deal with.
There seem to be a few boxes out there such as the Larscom and the
Axxessit that offer multiple 10/100 ports, but we are looking to create
a single pipe with this bandwidth rather than carve it up among 10/100
ports, and ethernet aggregation does not always achieve effective
multiplexing.
The cost we are looking for is around $2,000-2,500 US. The RAD box
comes in around that price. |
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