Panasonic KX-TD500 System Reference Manual page 239

Conditions
1. Calls which can arrive at UCD group (05-32)
are:
(1) Outside calls
• Incoming outside calls via DIL (1:1) for
which call destination is set as FDN of a
UCD group
• Incoming outside calls via DID by dialing
FDN of a UCD group
• Incoming outside calls via DISA by dialing
FDN of a UCD group
• Incoming outside calls transferred by the
Extension or Attendant Console
(2) Extension calls
• Calls made by extension or attendant
console by dialing FDN of UCD group.
• Calls transferred by extension or attendant
console by dialing FDN of UCD group.
2. Login and Logout
Members can leave the group temporarily
when they will be away from their desks, to
prevent calls being sent to their extension.
(Logout)
They can return to the group when they are
ready to answer a call. (Login)
Refer to Section 4-D-8.00 "Uniform Call
Distribution (UCD)- Log Out" for more
information on login and logout.
3. Busy status
• When "Do Not Disturb (DND)" or "Call
Forwarding" has been set to the extension.
• When any one of PDN is used.
(Including using own PDN as an SDN at
another extension)
• When the extension is off-hook.
<LCD display> (Extension user only)
When all extensions within a UCD group are
busy, the display, if provided, of the caller's PITS
shows:
1234: UCD GRP 12
↓ ↓
FDN UCD group number
4. Overflow destination
One of the following three destinations can be
assigned as the overflow destination (OFDN)
per UCD group (05-32)
• Attendant Console
• Extension
• Another UCD Group (05-32)*
* UCD group (01-04) is not available to set
as the overflow destination of a UCD
group (05-32).
<LCD display> (Extension user only)
When a call to a UCD group is transferred and
placed to another UCD group assigned as
overflow destination, the display, if provided, of
the caller's PITS shows:
→ 5678: UCD GRP 08
(Treatment of the calls transferred to the overflow
destination (OFDN))
(1) What if the overflow destination is busy?
The call is put in the waiting queue, and will
begin to ring at the overflow destination as
soon as it becomes idle.
The call may begin to ring at a group
member's extension, if it becomes idle while
overflow destination is still busy.
The call is put in
the waiting queue.
The call begins to
ring at a group
member's extension.
3-D-21
or
No
Is overflow
destination idle?
Yes
The call begins to
ring at overflow
destination.