Dear All

i have site with CCM7 and with cisco phones and sip Linksys phones i need to know how to make the two sip phones shared lines and ringing at the same time as i have room have two cisco phones and two sip Linksys spa 901 , how can i create shared line between sip phones as every sip phones work with user and password and the user should be the extension of the phones but when i tried to to shared the two phones with the same user it didnot work and the two sip phones didnot work