what options are available from the carriers for the local loop into either an old Frame or new MPLS network when we need more than a single T1, but less than a DS-3
What about the copper vs fiber issue.... if we only have copper avail going into our facility.
PS - any other newsgroups where this non-specific hardware vendor, and more carrier oriented discussions might take place ?
tnx -
If you have to get into a F/relay cloud then the best you can do is probably N * T1 - either treat them as a line group or just partition your PVCs down different pipes.
An alternative that was popular in Europe was to use IMA to aggregate several E1s into a bigger logical ATM pipe - you lose maybe 15% to cell overheads, but the balancing happens per cell, so you get very good utilisation of all the pipes.
MPLS is the way to go for more choices - uk fix for the same kind of in between speeds is 10 Mbps Ethernet as a tail (or SDH on a CPE mux at your site) - but you need fibre access for it.
You can get higher speed than T1 on ADSL / SDSL, and maybe find a telco who allows bonding? Some of the systems (pairgain?) will bond multiple SDSL links and present it as Ethernet.
Finally - work supports Ethernet over microwave as a tail at up to 100 Mbps - but you need a carrier that supports it, and line of sight to an equipped mast.
Given the costs for microwave, dishes et al it may be cheaper to get fibre installed anyway (depending on how far you are from a useable duct) - and the fibre will give you a way to get to 1 Gbps and higher.
if you can get fibre and it is reasonable cost, then do it.
you could always start one :)
tnx for the info - I guess I'm looking at how to accomplish the N*T1 physically ? We had previously used Sprint - and they offered muxing T1's using the Datalink ? mux.
BUT - that required the carrier to have one on their end, and offer the service.
SO - just checking to see what's around (in the US) that is offered from the carrier, and what hardware is required to performing the muxing function.
We have a location where the 40 year old telco conduit is totally full, and for a new fiber run, they need to cut across the street, some land, parking areas, etc to even get to the physical building entrance...
Call Charles Industries in Rolling Meadows, Illinois. They offer a DS3 mux....
-ja
We use partial DS3. Populate channels as required. Or for INET, upgrade spead as requried, Only good if you start out with at least 8 T1 for voice. SCB/AT&T uses the MX2800 on the CPE side for the Mux t1 used for Voice/Data. For Inet they just install a router with DS3. Then charge for bandwidth as ordered..
Assuming your entrance has some coax available.
If you are cocerned with only data muxing using T1's to transport for the purpose of establing higher spead internet then all the major mfr have IMA cards for their routers to inverse multiplex T1s. Cisco's IMA works well. Not sure about Nortel IMA cards. The previous statement of ATM cell overhead applies.
Chris
tnx - I'll take at look at the various router vendors for Inverse Muxing cards... what model is the Cisco IMA ?? and what model is the Nortel IMA ??
BTW - this is our situation....
i worked in a situation like this once. we were building our MPLS network, and both large office locations we needed at least 6 megabits to the MPLS network. We could not get DS3's into either building w/o the carrier making us pay for the installation of the DS3 (long story). We were able to with AT&T to use MLPPP to bond 4 T1's together and connect to their MPLS cloud. At the time, November 2005 they were only allowing certain companies to do this, but if you went to AT&T and pushed them, they will likely do the MPLS over MLPPP due to your extranous situation.
2 Channelized T1/PRI ports on a WIC
interface Multilink1 description *** Dual DS-1 (T1) to Telco *** ip address (your IP address) 255.255.255.252 ip access-group multilink1_in in ip access-group multilink1_out out no cdp enable ppp multilink ppp multilink group 1 ! interface Serial0/0/0:0 description *** (this is a great place to put your circuit ID) *** bandwidth 1544 no ip address encapsulation ppp no fair-queue ppp multilink group 1 ! interface Serial0/0/1:0 description *** (this is a great place to put your circuit ID) *** bandwidth 1544 no ip address encapsulation ppp no fair-queue ppp multilink group 1
2 Channelized T1/PRI ports on a WIC
interface Multilink1 description *** Dual DS-1 (T1) to Telco *** ip address (your IP address) 255.255.255.252 ip access-group multilink1_in in ip access-group multilink1_out out no cdp enable ppp multilink ppp multilink group 1 ! interface Serial0/0/0:0 description *** (this is a great place to put your circuit ID) *** bandwidth 1544 no ip address encapsulation ppp no fair-queue ppp multilink group 1 ! interface Serial0/0/1:0 description *** (this is a great place to put your circuit ID) *** bandwidth 1544 no ip address encapsulation ppp no fair-queue ppp multilink group 1
last time i checked a cisco 28xx or 38xx could take the AIM-IMA card - this supports IMA on up to 4 links - the bigger routers can take 2 AIMs, but not sure if 2 IMA cards is going to work.
Or if you need 1 bigger block of circuits, then a 7200 can take an 8 port T1 IMA card, and you can have multiple cards, although each card supports a different ATM interface.
1 thing i mentioned that you skipped past - if you need lots of PVCs to different remote sites, then each PVC may not need to go over 1.5 Mbps.If so, just use separate T1s and spread the PVCs across them to balance the load.
For the Cisco the Card is the: NM-8T1-IMA
8-port T1 ATM Network Module with IMA New should be no more than $3500. Used, less than that.They MSRP is about $5062
The card will fit into a router chassis. If you ware needing both ends then you will need to purchase two cards, and two routers.
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