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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SCCP)
OL-3141-01
Appendix A How to Use Pre-call and Mid-call Services
Procedures for Using Mid-call Services
Cisco ATA Style Conference Calling Procedure
Step 1 While engaged in a call, perform a hookflash, then press 3 on your telephone keypad.
Step 2 When you get a dial tone, dial the telephone number of the third party with whom you want to
conference.
Step 3 When the other party answers or the remote telephone rings, perform a hookflash. You can hang up at
any time to halt adding the new party to the conference.
Step 4 After you hang up, the telephone rings if the original party is still holding.