Thanks for your replies , However i need to know if it really a big value to transfer my connection to use that channelized module or not , are the ISP has to use the same module in front of my connection , the fiber cable is differ , the module accept the configuration of BW limitation & tunneling as GRE tunnel or not .
the ISP connection is a fiber cable through a converter connected to SPF port of supervisor engine .
Are you evaluating a new ISP proposal?
yes , is it better at all or not and specially for my setup the as 2 STM1 on different locations connected to each other by a 2 gre tunnel with bw determination based on layer 2 vlan across the provider(pass vlan tag throug trunk ).
supervisor model on your C7606.
SPA 400, i don't know about SIP
Kindly i need to know all advantage and knowledge about the 2 solutions .
As indicated above. It is better to not use converters because you can monitor the true status of the circuits, apply QoS directly and effectlivey, moreover there is one less device that can fail and is charged in the bill.
Earlier you need a converter box if ISP want to give you GE interface instead of STM. But now Same SDH box can provide you either STM or GE interface you dont need any converter box if ISP have right kind of box in your facility.
What is the speed are you looking at is STM 1 (155Mb )is enough or you need more. If need more then you can have it on GE interface only thing you have to see the distance whether ISP can provide you GE interface on Copper or fiber cable for that disatnce. You need to check the feature you are looking is available on GE card or STM card.
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