[OpenSIPS-Users] multiple via headers

[chamo]

hello
i am trying to make openser (opensips) v1.3 to work with cisco
i've read somewhere that there is problem with implemetation of SIP 
protocol , on cisco router are via headers comma separated
in implementation of SIP on opensisp are via headers on multiple lines 
(i am not sure it is really so, can you verify my suggestion? )

is there any way how to use comma separated via headers on opensips ?

i tried use remove_hf('via') and advertised_address without sucess

thanks