Accessing the 8Mbps port on an NM-4T

[adrian.harte]

Situation: We're upgrading our circuit from 2Mbps (E1) to 4Mbps. The NM-4T (which supports up to 8Mbps on port 0) seems to be the cheapest way to do this.

My question is - what kind of cable needs to be used to connect this port to the CSU/DSU? The doc's on the NM-4T say use a "5-in-1" cable (i.e. DB60-> something), but looking at all of the cable specs they all seem to max out at 2Mbps.

Thanks in advance

Adrian

[mchin345]

Check the below link for 5-in-1 cable . Its nothing but u can use it for different WAN circuit standards

EIA-530

EIA/TIA-232

EIA/TIA-449

V.35

X.21

http://www.cisco.com/en/US/products/hw/iad/ps492/products_installation_and_configuration_guide_chapter09186a008007e10e.html

[adrian.harte]

Thanks -

but my point was that none of these cables specifically says that it can handle an 8Mbps connect speed at any length.

Specifically :

EIA/TIA-232 gives a max speed of 115.2kbps over a 3.7M cable distance: http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a00801f5d8b.shtml

X.21 gives a max speed of T1 (1.5Mbps) over a 15m distance:

http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a00801f5d8f.shtml

V.35 gives a max speed of T1 (1.5Mbps) over 15m as well: (and with a specific warning not to exceed 2Mbps (and the warning also applies to 449)

http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a00801f5d8e.shtml

I can't find any documents giving speed recommendations for EIA-530 at all.

So, perhaps I should rephrase the question - what type of cable (and length) do people use to connect two ports running at 8Mbps when their choice is one of the options in a "5-in-1" cable?

Thanks

Adrian