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Since we haven’t done so yet, we’re also going to configure basic music on hold, using
the sample file:
$ sudo cp ~/src/asterisk-16.<TAB>/configs/samples/musiconhold.conf.sample \
/etc/asterisk/musiconhold.conf
$ sudo chown asterisk:asterisk /etc/asterisk/musiconhold.conf
Next you need to create the queues.conf file, which we’re not going to edit because
we’ll be creating our queues in the database (it just needs to be there):
$ sudo touch -u asterisk queues.conf
Next, we’re going to create some queues in our database:
MySQL> INSERT INTO `asterisk`.`queues`
(name,strategy,joinempty,leavewhenempty,ringinuse,autofill,musiconhold, \
monitor_format,monitor_type)
VALUES
'sales','rrmemory','unavailable,invalid,unknown','unavailable,invalid,unknown','no','yes',\
'default','wav','MixMonitor'),
('support','rrmemory','unavailable,invalid,unknown','unavailable,invalid,unknown','no',\
'yes','default','wav','MixMonitor') ;
This will give us two queues named sales and support. You can name them anything
you want, but we will be using these names later in the book, so if you use different
queue names from what we’ve recommended here, make note of your choices for
future reference.
We have also defined the parameters outlined in Table 12-1.
Table 12-1. Sample queue parameters
Parameter
strategy=rrmemory
joinempty=unavailable,invalid,unknown
leavewhenempty=unavailable,inva
lid,unknown
Purpose
Use the round robin with memory strategy
Do not join the queue when no members available
Leave the queue when no members available
Creating a Simple ACD Queue
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Parameter
ringinuse=no
autofill=yes
musiconhold=default
Purpose
Don’t ring members when already InUse (prevents multiple
calls to an agent)
Distribute all waiting callers to available members
Play music from the [default] class (see
musiconhold.conf)
The strategy we’ll employ is rrmemory, which stands for round robin with memory.
The rrmemory strategy works by rotating through the agents in the queue in sequen‐
tial order, keeping track of which agent got the last call, and presenting the next call
to the next agent. When it gets to the last agent, it goes back to the top (as agents log
in, they are added to the end of the list).
A Few Notes on Strategies
ringall
Rings all available members (default). This distribution strategy doesn’t really
count as ACD. In traditional telephony terms, this would be known as a ring
group.
leastrecent
Rings the interface that least recently received a call. In a queue where there are
many calls of roughly the same duration, this can work. It doesn’t work as well if
an agent has been on a call for an hour, and their colleagues all got their last call
30 minutes ago, because the agent who just finished the 60-minute call will get
the next one.
fewestcalls
Rings the interface that has completed the fewest calls in this queue. This can be
unfair if calls are not always of the same duration. An agent could handle three
calls of 15 minutes each and her colleague had four 5-second calls; the agent who
handled three calls will get the next one.
random
Rings a random interface. This actually can work very well and end up being