Optics and Optical Networking

GentsI have the general understanding of what is single mode, multi mode fibre etc. and how the 62.5 and 125 is determined. but have some confusion over how the other numbers are determined i.e. the 850nm 1310nm figures for mmf. Are these numbers det...

I want to know how can impact a very large NEWPTR and NSE alarms at path level and few FEBES in STM-1 Link

I am evaluating solutions for monitoring traffic on a PoS link. We are proposing to do this as follows:Placing a TAP on the PoS link between two PoS switches. This TAP takes a copy of all traffic on the link and forwards it to a PoS router. The TAP ...

why we ping the same ip address(210.14.211.242),using different platform,ie cisco router and pc in the same place, but get two different result, one is unreachable,one is reachable.

I have several GSR routers with OC-12 POS blades using OSPF connected to a DWDM ring using Nortel's Optera 5200. It appears that whenever a line side protection switch takes place, that the POS blades react to this, and reconverge OSPF even though th...

HiWe have a 3620 router with a fast ethernet card.the IOS version is 12.0(13)When we add the ATM OC3 Network Module NM-1A-OC3MM,our router doesn't recognize it.The EN Led flashes once and then goes off.We have tried 2 different cards with 2 different...

Can the network managment show what interface type the client is transmiting? Can the software confirm if the client is transmiting ESCON or STM-1?

I have two IGX connected at 155 Mbps via Fiber Optic.I have 6 WDM regenerator across the line, but these equipment I can´t access remotely. I want to put a equipment available via IP. My restriction is don´t eliminate the IGXs. Is possible that? Reg...

How many AIS reports to a DS3 card and or DS1 card will cause the Automatic UPSR switch which faces the OC-N cards

I have connected 2 IGX right now, at 155 Mbps by fiber optic link, this link contains four optical regenerator across the link (with redundancy). These equipments (regenerators) can´t be access remotely. I want to know if Cisco offers a solution for ...

hi all,sdcc channels are the D1,D2,D3 bytes in the header part of the sdh. these channels are used for network management data. in dcc we use to hdlc or LapD/ppp protocol at data link layer and then ip protocol. ip is the logical address so what is t...

Dears,I would like to know if Gigabit ethernet on WAN uses the POS tehcnology ( packet over sonet ) or something else ( what ) ?What is the maximum speed for gigabit on WAN ?Concerning the MAN, is it true that Gigabit on MAN uses the DWDM technology ...

Can the Cisco ONS 15454 establish multiple VLANS accross one STS-1? Or does each VLAN require a dedicated STS-1?

I have read a lot of references about ATM but have no idea about how to implement it,what I should do with ATM,what is the steps I should take in implemneting ATM,and what the devices I need to take in mind.is there any detail implementation resource...

My company and I are about to start laying long streaches of fiber. I am looking for some solutions to provied voice/video/and IP over distances of at least 100 KM to 2000 KM. I can give complete specs on our cable in the near future however its 8 st...