--- queues.conf ---

[main]
music = default
announce = beep
strategy = rrmemory
context = queuefail
timeout = 15
retry = 5
wrapuptime=15
maxlen = 0
announce-frequency = 90
announce-holdtime = yes
; announce-round-seconds = 10
queue-youarenext = queue-youarenext             ;       ("You are now first in line.")
queue-thereare  = queue-thereare                ;       ("There are")
queue-callswaiting = queue-callswaiting ;       ("calls waiting.")
queue-holdtime = queue-holdtime         ;       ("The current est. holdtime is")
queue-minutes = queue-minutes                   ;       ("minutes.")
queue-seconds = queue-seconds                   ;       ("seconds.")
queue-thankyou = abacus/ThankPatience           ;       ("Thank you for your patience.")
queue-lessthan = queue-less-than                ;       ("less than")

joinempty = no
leavewhenempty = yes

member => Agent/101
member => Agent/102
member => Agent/103


--- agents.conf ---


group = 1
agent => 101,2247,Agent 101
agent => 102,2247,Agent 102
agent => 103,2247,Agent 103


--- console output ---
abacus*CLI> show queues
main         has 0 calls (max unlimited) in 'rrmemory' strategy (0s holdtime), C:0, A:0, SL:0.0% within 0s
   Members:
      Agent/101 has taken no calls yet
      Agent/102 has taken no calls yet
      Agent/103 has taken no calls yet
   No Callers

default      has 0 calls (max unlimited) in 'ringall' strategy (0s holdtime), C:0, A:0, SL:0.0% within 0s
   No Members
   No Callers

abacus*CLI> show agents
101          (Agent 101) not logged in (musiconhold is 'default')
102          (Agent 102) not logged in (musiconhold is 'default')
103          (Agent 103) not logged in (musiconhold is 'default')
abacus*CLI>

In this configuration, I would not expect to be able to join the queue, yet I can:

abacus*CLI> show queues
main         has 1 calls (max unlimited) in 'rrmemory' strategy (0s holdtime), C:0, A:0, SL:0.0% within 0s
   Members:
      Agent/101 has taken no calls yet
      Agent/102 has taken no calls yet
      Agent/103 has taken no calls yet
   Callers:
      1. IAX2/hedwig@hedwig/2 (wait: 0:09, prio: 0)

default      has 0 calls (max unlimited) in 'ringall' strategy (0s holdtime), C:0, A:0, SL:0.0% within 0s
   No Members
   No Callers

    -- Started music on hold, class 'default', on IAX2/hedwig@hedwig/2
abacus*CLI> show agents
101          (Agent 101) not logged in (musiconhold is 'default')
102          (Agent 102) not logged in (musiconhold is 'default')
103          (Agent 103) not logged in (musiconhold is 'default')
abacus*CLI>