NEAX2400 IPX ISDN Features and Specifications
Page 134 NDA-24311, Issue 1
U-6 Uniform Call Distribution (UCD) - PRI
U-6 Uniform Call Distribution (UCD) - PRIGeneral Description
This feature distributes incoming calls from ISDN trunk to a group of up to 100 stations . Calls are di stribut ed to idl e
stations, in a circular pattern, in the order which they arrive.
If a station transfers a call to a busy UCD group, the call can wait in queue until a sta tion in t he group bec omes idl e.
Operating Procedure
To transfer a call to a busy UCD group
1. All the stations in a UCD group are busy.
2. A user not in the group answers an incoming call (trunk or station).
3. The user dials the UCD pilot number after pressing the switchhook or the TRANSFER key.
a.) The user hears busy tone.
b.) The calling party is held.
4. The station goes on-hook.
The calling party hears ringback tone. (during queuing)
5. The UCD group becomes idle.
a.) The call terminates to an idle station in the UCD group.
b.) The calling party is hearing ringback tone. (during ringing)
6. The idle station answers the call.
Now the calling party is connected to the UCD station.
Service Conditions
1. The maximum number of UCD groups is 63.
2. Up to 100 stations can be programmed into a single UCD group.
3. UCD groups are assigned through the MAINTENANCE ADMINISTRATION TERMINAL (MAT)
[M-18].
4. Stations are arranged in STATION HUNTING - CIRCULAR [S-7] group. A call to the group starts at the
first idle station after the last station that received a call.
5. If all of the group’s stations are busy, the call waits in a queue. The caller he ars the ringb ack tone. The fi rst
call in the queue will be answered first.
6. A station can block UCD calls by dialing a Make Busy code (1 to 3 digits), or by pressing the DND or
BYO key (if it is a Dterm). The station can still make calls and receive calls to its own telephone number.
7. Each UCD group is assigned a UCD group number, allowing DIRECT INWARD DIALING [D-8] calls
to be routed to selected groups.