In order to use the blind transfer feature on the Cisco SPA8000, SPA112 or other Cisco/Linksys/Sipura ATA you should follow these instructions....

1. Have the call active
2. Press the hook flash, this should put the call on hold and you should hear a dial tone.
3. Dial *98, you should now hear another tone.
4. Dial the number you want to transfer the call to. Wait for another tone.
5. Hang up.

You will need to make sure the following parameters are set in VCP (Manage Device-> (select your device)-> Manage Parameters

- Enable Blind Attn Transfer - ENABLE
- Unattn Transfer Service - ENABLE
- Dial Plan should include *98S0... eg
(911S0|*98S0|*[0-5]xS0|*69S0|*7[3789]S0|*87S0|*93S0|*99S0|*xx.|1[2-9]xx[2-9]xxxxxxS0|[2-9]xxxxxxxxx|x.)