After a firewall change, calls between two offices connect and the phones ring, but neither side can hear the other. What is most likely being blocked?
Après une modification du pare-feu, les appels entre deux bureaux s'établissent et les téléphones sonnent, mais aucun des interlocuteurs n'entend l'autre. Qu'est-ce qui est le plus probablement bloqué ?
Answers
ASIP on port 5060, which carries the ringingSIP sur le port 5060, qui transporte la sonnerie
BThe RTP media streams on their UDP port rangeLes flux média RTP sur leur plage de ports UDP
CDNS lookups used by the phones to find the PBX by nameLes requêtes DNS que les téléphones utilisent pour trouver le PBX par son nom
DThe phones' DHCP leasesLes baux DHCP des téléphones
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