I can imagine. The aim of this link is to use for voice communication for the call center and add third part application to handle MAP/TCAP for location based services on the same e1 is there a way of making asterisk not to care about sccp and leave that to the third part!! I was assuming that the link should come up anyway Whats your view Sam > Sam, the ISUP protocol is used on circuit related comunications, for > instace > IVR, etc. And, the SCCP proctol is used to transport non circuit related > data like, TCAP, MAP, etc. > > If you're connected to a mobile operator, normally it's for MAP o INAP > protocols. > > Ask the other end, what is the type of connection the linkset will be used > for. > > RK >