good morning i have a question for you 
i want to connect an isdn telephone central with asterisk.
my idea is the use of 2 isdn cards, one (2 digital lines) to connect the ptsn with the asterisk server, the other one to connect the asterisk server with 2 lines of the isdn central.
what kind of isdn cards should you use to have a sufficient qualit wihtout a very high budget? (my idea is the use of 2 atlantis mistral PCI)