If you have a PEC you need a two IP addresses for the private and public IPs. Do you have that? Also are the remote phones Inter-tel IP phones or 53XX phones. Don't forget to check the NAT/Native in each phones.
Inter-tel Axxess, Mitel CS/HX5000, MiVoice Office CCS/CSM, VPU, EM, ATM4, A+, CTP+, NET+, OAISYS, Audicodes, Polycom, Spectralink, NEC Red, Samsung, Mitel Call Recording, Mitel MBG, MiVoice Office, Xarios. Mitel Phone Manager
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