I’m using asterisk as a VOIP<->PSTN gateway with one E1 Trung and SS7 signaling. I have following problem. When from voip is called emergency number (in poland it is 112, and in US AFAIK 911) as I understand regulations in Poland i have to pass it throu SS7 in following format:
XX is a direction number (in us it will be number representing state)
C - is hexadecimal “C” or 0xC
YYY it is numer representing emergency office in "state"
112 is our emergency number
I don’t know how to configure asterisk to pass “C hex” throu SS7 trunk.