10.8.3. User Interface 
Only one feature access code is provided for Call Hold and retrieval.
Only an Anate can put a call into a hold position via the Call Hold
analog access code. The following acknowledgements are given to the Anate
for placing a call on hold :
- Confirmation tone, when holding was successful.
- Immediate talk, when an existing call was already on hold.
- Busy tone, when call hold is not allowed for partner device type.
- Reorder tone for all other cases, where holding is not possible.
The held subscriber is given announcement or music or silence, while on hold.
The same Call Hold analog access code will be used to retrieve the call again from
the hold
position. The following acknowledgements are given to the Anate:
- Immediate talk, for retrieving a Call Held party.
- Reorder tone, when attempting to retrieve a party and the hold location is empty.
A party left on hold (single held) recalls the Anate that placed the call on "Call
Hold
analog" after the timeout of the Hold Recall timer, or is intercepted to the Attendant/ACWin,
dependent upon the system parameter (COT parameter SPAH) and the state (idle, busy
or out of
service) of the party that held the call.