DS3 mux recommendation

Lee Riemer lriemer at bestline.net
Thu Sep 9 16:12:12 UTC 2010

  We've switched away from the CAC Widebank28s for the denser, cooler 
Adtran MX2820s.  Our reasons were for the exact issues explained below.

On 9/9/2010 11:03 AM, Jon Lewis wrote:
> On Thu, 9 Sep 2010, Jay Nakamura wrote:
>> I haven't researched stand alone DS3 mux in a long time and was
>> wondering if anyone can recommend a DS3 Mux.  I have used Adtran
>> before. (Long ago)  The products back then worked fine on line level
>> but management interface was awful and if you threw too much SNMP at
>> it and the management interface locked up.
> We've used a lot of the Carrier Access Widebank28.  They work, but you 
> have to figure on the controller cards dying every roughly 5 years.  
> I've lost track of how many times we've had to send a tech on a long 
> drive to an unmanned POP to swap cards.
> AFAICT, they're insufficiently cooled (ineffective heat sink / no 
> active ventilation unless you spring for the front cover with built-in 
> fans, which IMO should have been standard).  The few Adtrans I've used 
> have had issues with putting out too hot a signal for cisco MCT3 
> interfaces, requiring either an attenuator or long service loop.  The 
> orientation of the T1 cable connectors on the backs of the Widebank28 
> and Adtrans differ, making swapping one for the other post-deployment 
> a royal PITA.
> ----------------------------------------------------------------------
>  Jon Lewis, MCP :)           |  I route
>  Senior Network Engineer     |  therefore you are
>  Atlantic Net                |
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Lee Riemer
Director of Technical Operations
Bestline Communications, L.P.
Voice: 1+512.328.9095
Fax: 1+512.328.0038

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