I am connecting to FB over an ISDN line and am having problems with
the connection being lost and with spurious calls from the server end
ofthe connection. Researching the data available for this problem
seems to indicate that the problem is due to the dummy_packet_interval
value being set to the default of 60s. I have tried to change this to
a higher value by modifying ibconfig but this seems to have no
effect. Also, changing the connection_timeout value has no effect. I
have stopped and restarted the FB server after making the changes.
Using FB1. The application is written in Delphi and uses IBO to
connect to FB.

This is the ibconfig file I am using

#V4_LOCK_MEM_SIZE 98304
#V4_LOCK_SEM_COUNT 32
#V4_LOCK_SIGNAL 16
#V4_EVENT_MEM_SIZE 32768
#DATABASE_CACHE_PAGES 2048
#SERVER_PRIORITY_CLASS 1
#SERVER_CLIENT_MAPPING 4096
#SERVER_WORKING_SIZE_MIN 0
#SERVER_WORKING_SIZE_MAX 0
#V4_LOCK_GRANT_ORDER 1
#ANY_LOCK_MEM_SIZE 98304
#ANY_LOCK_SEM_COUNT 32
#ANY_LOCK_SIGNAL 16
#ANY_EVENT_MEM_SIZE 32768
#LOCK_HASH_SLOTS 101
#CPU_AFFINITY 1
dummy_packet_interval 3000
connection_timeout 7200

Pleeeeeeeease can someone help!