You can make calls from one Cisco ATA to another Cisco ATA in an H.323 network that does not contain an H.323 gatekeeper.
For one Cisco ATA to access a specific FXS port on another Cisco ATA, you use an IP dialing procedure. The Cisco ATA originating the call must have the following information about the destination Cisco ATA:
â¢E.164 phone number of the destination FXS port
â¢IP address of the destination Cisco ATA
To enable the IP dialing procedure, you need to set the IPDialPlan parameter to 1 to instruct the Cisco ATA to look for the destination IP address in the dialed digits.
Cisco ATA X is going to initiate a call to Cisco ATA Y (with the following pertinent information):
â¢IP address of Cisco ATA Y-192.168.2.112.
â¢E.164 phone number for the Phone 1 port of Cisco ATA Y-1:5556666
â¢E.164 phone number for the Phone 2 port of Cisco ATA Y-2:5558888
To call the Phone 1 port on Cisco ATA Y, you would dial 5556666**192*168*2*112#.
To call the Phone 2 port on Cisco ATA Y, you would dial 5558888**192*168*2*112#.
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