[Asterisk-Users] Zaptel DACS and FDL

[Eric Wieling]

Jerry wrote:

> 
> On Feb 16, 2005, at 3:07 PM, Eric Wieling wrote:
> 
>> I have the following configuration:
>>
>> CLEC -> T-1 -> Asterisk -> Adtran Channel Bank -> (analog) -> Nortel
>>
>> Don't complain that it's ugly.  I've already done plenty of that.
>>
>> The CLEC manages their Adtran remotely and needs to be able to 
>> continue to do so.  I assume they use FDL to do the management.  We 
>> are using the Zaptel DACS/DACSRBS to cross connect some of the 
>> channels directly between the CLEC and the Adtran.  These are channels 
>> we don't really care about (data, other voice, etc).  We are not cross 
>> connecting all the channels, just some of them.
>>
>> I'm wondering if/how I can make sure the remote management via FDL 
>> continues to work.  Does anyone have any information on this or 
>> suggestions or anything?
> 
> 
> What you dropped from your diagram is the T1 from * to the channel bank. 
> FDL is a link level protocol. It is carried in the framing bits of the 
> T1 not within the payload bits. When you use the digium (I presume) card 
> within your * server as a DACS this is connecting the payload, ie 
> timeslot, bits from one port to another. FDL will not work this way.

DACSRBS does DACS the robbed bit signalling.  I assume this won't 
help?   Ah well.  We'll try to find some other way to do it.