Hi all, I hope am addressing this to the correct forum cause the last thing I want to do is waste your valuable time. Am trying to do an interconnect a PSTN with my asterisk box am using sangoma cards for the interconnect and they have given me a form to fill in but many things on that form don't make much sense to me even after I visit google . Can ny one tell me where I can find documentation which can answer questions like; MTP, ISUP, TUP SCCP version supported error correction method bearer capability/ Transmission Medium Requirement circuit double seizure handling reset facilities DCME ccts PCM coding law pulse line coding technique frame structure cyclic redundancy check (on/off) Any assistance will be highly appreciated. Regards, Muwazi Daniel