Inbound IP address and outbound IP address are 2 different things.
Maybe Dialog is using the same range IP addresses for its outbound connection (WAN IP)
If that is the case, then all users in the range will get the same IP. So then the limit gets over soon.
Solution is to increase the number of users for Dialog. Then they have to add more outbound IP addresses.
Maybe Dialog is using the same range IP addresses for its outbound connection (WAN IP)
If that is the case, then all users in the range will get the same IP. So then the limit gets over soon.
Solution is to increase the number of users for Dialog. Then they have to add more outbound IP addresses.

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