Blind call transfer not working

[EvgeniyD]

There is Avaya s8300 Server, Avaya G700 Gateway, all phones 1608.
For example we try to make a blind transfer frome number 1285 (transfer->dial the number-> put the handset down) to number 1286 but after picking up handset on 1286 we hear a dial tone. After this the call hold on 1285 on second line.
What and where to set up incorrectly?
Below the trace of call:

time data

16:05:10 Calling party station 1285 cid 0x99
16:05:10 Calling Number & Name 1285 TEST
16:05:10 dial 1286
16:05:10 ring station 1286 cid 0x99
16:05:28 G711MU ssff ps:20
rgn:1 [192.168.2.15]:3200
rgn:1 [192.168.0.92]:2066
16:05:28 idle station 1285 cid 0x99
16:06:44 Calling party station 1285 cid 0xa6
16:06:44 Calling Number & Name 1285 TEST
16:06:44 dial 1286
16:06:44 ring station 1286 cid 0xa6
16:06:52 idle station 1285 cid 0xa6
16:06:55 active station 1286 cid 0xa7
16:07:01 idle station 1286 cid 0xa7

 

[kyle555]

display system-parameters features                              Page   7 of  20
                        FEATURE-RELATED SYSTEM PARAMETERS

CONFERENCE/TRANSFER
               Abort Transfer? n                 No Dial Tone Conferencing? n
        [highlight #FCE94F]Transfer Upon Hang-Up? n[/highlight]       Select Line Appearance Conferencing? n
             Abort Conference? n                                    Unhold? y

 

[EvgeniyD]

It works, thank you very much.