What Serial Ports to buy for 2620XM

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Oct 7th, 2008
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Hi


I am confused of what serial ports to buy for 2620XM.



In this link in figure 4 there is a network module that has 8 serial ports. But they are asynchronous/synchronous serial ports?


The link is:


http://www.cisco.com/en/US/prod/collateral/routers/ps274/product_data_sheet09186a0080091b8b.html



If I compare these serial ports and the serial ports that I get in WIC-1t, what is the differece?




In WIC-1t the serial port is DB60 (the big one) compared to WIC-2t. If I want to have a card that has two serial ports like in WIC-1t, do I have to buy two WIC-1t cards or are there any card that has that size two serial ports?


Thanks in advance!

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ohassairi Tue, 10/07/2008 - 01:47
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1-asynchronous/synchronous serial ports are low speed ports : max 128kbps.

however with wic-1t or wic-2t you can reach 2mbps.


2-if you wan to use the DB60, you must buy two WIC-1t cards or NM-4T.

wic-2t works with smart serial cables

jay77jay77 Tue, 10/07/2008 - 02:01
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NM-4T is not supported on 2620.

So you wud need to buy 2x WIC-1T


Cheers!

omal Tue, 10/07/2008 - 02:25
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Hi


Many thanks for your replies.


1) Why would someone buy low speed asynchronous/synchronous ports if the maximum speed it supports is only 128kbps?


2) In NM-4T there are four serial ports. Is there a way for me to get only 2 serial ports?


3) In NM-4T also we have low speed asynchronous/synchronous ports, right? What I want to do is run OSPFv3, EIGRPv6, BGP & IS-IS with IPv6. I hope these speeds of the serial ports have nothing to do with these routing protocols, am I correct?


4) Can I plug this NM-4T to 2620XM?


Thanks in advance!

omal Tue, 10/07/2008 - 03:00
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Hi


Thanks for your post. I checked that link. I saw that page earlier also. I got confused from that page because it didn't give information such as which cards can be plugged to which ports.


Thanks a lot!

ohassairi Wed, 10/08/2008 - 21:02
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1) Why would someone buy low speed asynchronous/synchronous ports if the maximum speed it supports is only 128kbps?

A: they are less expensive than wic-2T. if you are using the serial interfaces to connect them to one external modem (PSTN connection) then you r sure your speed will not exceed 128kbps

3) In NM-4T also we have low speed asynchronous/synchronous ports, right?

A: NM-4T is high speed interface but NM-4AS are low speed interfaces.

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