choosing proper WAN interface card...need help.

Answered Question
Feb 10th, 2010
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Hello!


I've got a 3845 ISR at the edge of my network.

ISP gives me E1, interfaced with V.35.

What network card/module and cable I should use for my ISR to connect E1 via v.35 interface on the PE hardware?


At first glance I look for WIC-1T or HWIC-4T, or HWIC-4A/S.

What for cable, I suppose that ISP is DCE, while my (H)WIC is DTE, so the cable will be CAB-SS-V35MT or

CAB-SS-V35FC ?


Thanks, WBR


Alex

Correct Answer by Edison Ortiz about 7 years 2 months ago

The E1 is handled by the external device.


Your router will only care about the serial connection from that device and the HWIC-1T will provide this for you.


As Paolo indicated, if you want to terminate the E1 on the router, then you need an E1 CSU/DSU,

http://www.cisco.com/en/US/prod/collateral/modules/ps5949/product_data_sheet0900aecd80710c77.html , not a serial interface as your original request indicates..

Correct Answer by Edison Ortiz about 7 years 2 months ago

WIC-1T is End Of Sale and its replacement is HWIC-1T1


You will need a DTE cable CAB-SS-V35MT


http://www.cisco.com/en/US/prod/collateral/modules/ps5949/datasheet_c78-491363.html

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Alexander Demin Wed, 02/10/2010 - 10:52
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Sorry,

Although HWIC-1T support synchronous maximum speed - 8 Mbps and V.35 serial protocol, I'm not

sure about handling E1 stream (2,048 Mbps, while T1 - 1,544 Mbps). ?

Correct Answer
Edison Ortiz Wed, 02/10/2010 - 12:33
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The E1 is handled by the external device.


Your router will only care about the serial connection from that device and the HWIC-1T will provide this for you.


As Paolo indicated, if you want to terminate the E1 on the router, then you need an E1 CSU/DSU,

http://www.cisco.com/en/US/prod/collateral/modules/ps5949/product_data_sheet0900aecd80710c77.html , not a serial interface as your original request indicates..

paolo bevilacqua Wed, 02/10/2010 - 11:40
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Ask ISP to eliminate the V35 converter.


Thsi way you will have one device less, and will be able to monitor the real performances of the E1 circuit.

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