AT&T MERLIN LEGEND System Reference Manual page 324

Features
Queued Call Console
Speed Dial
Station Message Detail
Recording
System Numbering
System Programming
Related Features
Pool buttons cannot be assigned to a QCC, but a QCC system operator can use
pools to make outgoing calls by selecting a Call button and dialing the ARS or
pool dial-out code. A QCC system operator can be assigned to receive calls on
trunks assigned to pools.
A Pool Status button is assigned as a fixed feature button on a QCC and
provides the system operator with status of all the trunk pools (a maximum of
11). The system operator presses the Inspect button, followed by the Pool
Status button, and busy or available status of trunk pools is shown on the
display.
A pool dial-out code can be included with the telephone number associated with
a Personal Speed-Dial or System Speed Dial code. However, one or two pause
characters must be programmed immediately following the pool-dial-out code to
allow time to receive the telephone company dial tone. A pause character is
entered by pressing the Hold button.
When outgoing calls are made by using a pool, the trunk selected by the system
is reported on the SMDR report.
Pool dial-out codes (the factory-set codes are 70 and 890-899) can be
renumbered.
Assign individual trunks to pools.
LinesTrunks -> Pools
Automatic Route Selection
Pool 2 - 2 7 5