Fiber Couplers are used to connect Fiber Inner Ducts in a Fiber Branch Enclosure. You can connect Fiber Inner Ducts using the Fiber Feature Editor by selecting the two Fiber Inner Ducts and choosing the ‘Couple’-icon :

This will connect the 2 selected Fiber Inner ducts using a Fiber Coupler. After coupling the Fiber Inner Ducts the picture looks like this :

The two selected Fiber Inner Ducts are now connected via a Fiber Coupler which you can see in Feature Explorer if you go to the connected features of one of the Fiber Inner Ducts :

Fiber Couplers are only allowed to be connected to Fiber Inner Ducts and they can only exist in the system when they have a connection. The following Fiber Couplers are invalid :

• Fiber Couplers with more then 2 connections
• Fiber Couplers with a single connection
• Fiber Couplers without a connection
• Fiber Couplers connected to other features then Fiber Inner Ducts

The following AdHoc-query will display all Fiber Couplers with invalid connections :

with T as
(      
select 	4300 		g3e_fno
	,	a.g3e_fid
	,	4301 		g3e_cno
	,	1 			g3e_cid	
	,	count(*) 	cnt	 
	from gc_ne_connect a
		inner join gc_ne_connect b on ( (b.node1_id = a.node1_id) or ( b.node2_id = a.node1_id) )
			and b.g3e_fno != 4300
	where a.g3e_fno = 4300 
		and a.node1_id != 0 
		and a.node2_id != 0
		group by a.g3e_fid
UNION
select 4300	g3e_fno
	,	g3e_fid
    ,	4301 g3e_cno
    ,	1	g3e_cid
    , 0 cnd
    from gc_ne_connect
    where g3e_fno = 4300 
    and node1_id = 0 and node2_id = 0
)select g3e_fno
	,	g3e_fid
    ,	g3e_cno
    ,	g3e_cid
    ,	cnt from t 
    where cnt != 2
    order by cnt desc

The result looks like this :

Hope this helps, Stephan