Operating system name and version: ubuntu 14.04.5 LTS
Version of smsd: smstools3-3.1.15
Smsd installed from: sources smstools3-3.1.15.tar.g
Name and model of a modem / phone: 32 port modem
Interface: USB

which I use only 18 modems to send sms

I have a problem slow move from outgoing to OTHER01 OTHER02 OTHER03 OTHER04 OTHER05 OTHER06

when i check
ls -l /var/spool/sms/sent/ | wc -l show than 2531
ls -l /var/spool/sms/outgoing/ | wc -l show 545
ls -l /var/spool/sms/OTHER01/ | wc -l show only 5
ls -l /var/spool/sms/OTHER02/ | wc -l show only 3
ls -l /var/spool/sms/OTHER03/ | wc -l show only 1
ls -l /var/spool/sms/OTHER04/ | wc -l show only 1
ls -l /var/spool/sms/OTHER05/ | wc -l show only 4
ls -l /var/spool/sms/OTHER06/ | wc -l show only 1

after 5 minutes later
ls -l /var/spool/sms/sent/ | wc -l show than 2560
ls -l /var/spool/sms/outgoing/ | wc -l show 565
ls -l /var/spool/sms/OTHER01/ | wc -l show only 2
ls -l /var/spool/sms/OTHER02/ | wc -l show only 2
ls -l /var/spool/sms/OTHER03/ | wc -l show only 1
ls -l /var/spool/sms/OTHER04/ | wc -l show only 1
ls -l /var/spool/sms/OTHER05/ | wc -l show only 3
ls -l /var/spool/sms/OTHER06/ | wc -l show only 1

setting smsd.conf

devices=GSM01,GSM2,GSM3,GSM4,GSM5,GSM6,GSM7,GSM8,GSM9,GSM10,GSM11,GSM12,GSM13,GSM14,GSM15,GSM16,GSM17,GSM18
outgoing = /var/spool/sms/outgoing
checked = /var/spool/sms/checked
failed = /var/spool/sms/failed
incoming = /var/spool/sms/incoming
report = /var/spool/sms/report
sent = /var/spool/sms/sent
mypath = /usr/local/bin
logfile = /var/log/smsd.log
loglevel = 5
alarmlevel = 4
delaytime = 5
errorsleeptime = 10
blocktime = 120
receive_before_send = no
autosplit = 3
internal_combine = yes
incoming_utf8 = yes
spool_directory_order = yes
delaytime_mainprocess = 1

[queues]
prov1 = /var/spool/sms/OTHER01
prov2 = /var/spool/sms/OTHER02
prov3 = /var/spool/sms/OTHER03
prov4 = /var/spool/sms/OTHER04
prov5 = /var/spool/sms/OTHER05
prov6 = /var/spool/sms/OTHER06

[provider]
prov1 = 081
prov2 = 082
prov3 = 083
prov4 = 084
prov5 = 085
prov6 = 086

[GSM01]
device = /dev/ttyACM0
queues = prov1, prov2
baudrate = 115200
incoming = yes
check_network=0
smsc = +6281000000
init = AT+CNMI=1,0,0,1,0
report = yes
using_routed_status_report = yes
mode = new
rtscts = yes
cs_convert = yes
memory_start = 1
send_delay = 0

[GSM02]
device = /dev/ttyACM1
queues = prov3, prov4
baudrate = 115200
incoming = yes
check_network=0
smsc = +6281000000
init = AT+CNMI=1,0,0,1,0
report = yes
using_routed_status_report = yes
mode = new
rtscts = yes
cs_convert = yes
memory_start = 1
send_delay = 0

[GSM03]
device = /dev/ttyACM2
queues = prov5, prov6
baudrate = 115200
incoming = yes
check_network=0
smsc = +6281000000
init = AT+CNMI=1,0,0,1,0
report = yes
using_routed_status_report = yes
mode = new
rtscts = yes
cs_convert = yes
memory_start = 1
send_delay = 0

etc


log smsd.log
2018-03-15 18:34:38,5, smsd: Moved file /var/spool/sms/outgoing/081313298789-2257817010047-eKKiRl to /var/spool/sms/OTHER01
2018-03-15 18:34:41,5, GSM01: Took 8.7 seconds to get a file /var/spool/sms/OTHER01/081258900083-2274417110037-grwAoq, lost 0 times, 2 SMS files and 0 LOCK files seen.
2018-03-15 18:34:43,5, GSM05: SMS sent, Message_id: 191, To: 085256225798, sending time 8 sec.
2018-03-15 18:34:48,5, GSM02: Took 9.4 seconds to get a file /var/spool/sms/OTHER02/082379478665-2257817010047-eKKiRl, lost 0 times, 3 SMS files and 1 LOCK files seen.

how to speed up the movement from outgoing to others?

forgive my fluent English

thank you