BNC E1 interface on a 2821?

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Jan 4th, 2010
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I ordered 2 E1's (4M total) from an ISP in Amman Jordan (Zain) and the only interface they supply is BNC.  How do I interface with this?   Does the NM-1T3/E3 do 4M subrate?

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gkonowal1 Mon, 01/04/2010 - 13:30
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Hi

Not connecting to E3, the ISP is providing 2- E1's for a total of 4M BW......the NM-1T3/E3 was the only module I found in the cataloge but I didnt know if it supported subrate (4M) traffic.

thx

paolo bevilacqua Mon, 01/04/2010 - 13:27
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Using VWIC-2MFT-xxx or HWIC-4T1/E1, in both cases, CAB-E1-RJ45BNC.


Regarding NM-E3/T3, you cannot connect it to E1 interfaces. Subrate does not mean doing that.

paolo bevilacqua Mon, 01/04/2010 - 13:35
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Baluns are not necessary anymore. The referenced cable is not a balun, just a phisical adapter,


The Cisco 4-Port Clear Channel T1/E1 HWIC is software-configurable between E1 or T1 operation, balanced or unbalanced E1 termination, and CSU/DSU


http://www.cisco.com/en/US/prod/collateral/modules/ps5949/product_data_sheet0900aecd80710c77.html


Same is true for all currently produced cards.

paolo bevilacqua Mon, 01/04/2010 - 13:44
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It does support subrate. You will need 12.3(8)T IOS.


As mentioned before. T3/E3 subrate DOES NOT allow to connect a T1 or E1 circuit.

Reza Sharifi Mon, 01/04/2010 - 13:52
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Hi Paolo,


So, does it have to connect to a T3/ET to subrate?


Reza

paolo bevilacqua Mon, 01/04/2010 - 13:54
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So, does it have to connect to a T3/ET to subrate?


He have to use one of T1/E1 cards indicated above, to connect the E1 circuits.

gkonowal1 Mon, 01/04/2010 - 13:54
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so options......

I will be getting 2 seperate E1's from the ISP on cable.  They will use PPP to combine into 4M usable BW.


1) I can use the 4-Port Clear Channel T1/E1 High-Speed WAN Interface Card (RJ jack interface), I will still need to convert from BNC to ENet? correct? or

2) Use the NM-1T3/E3 with the 12.3(8)T IOS? cable interface....correct on both or is one incorrect?

paolo bevilacqua Mon, 01/04/2010 - 13:58
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1) I can use the 4-Port Clear Channel T1/E1 High-Speed WAN Interface Card (RJ jack interface),

Yes, as indicated before.


I will still need to convert from BNC to ENet? correct? or

Use the cable indicated before.


2) Use the NM-1T3/E3 with the 12.3(8)T IOS? cable interface....correct on both or is one incorrect?

Cannot use NM-1T3/E3, as indicated before.


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