Playsms + Gammu + file service + Multiple Modem

ID playSMS Bantuan
1

Saya sudah install Playsms pada Debian + Gammu, dengan 3 modem.
Tapi saya kesulitan ketika menggabungkan 3 modem tersebut. dan yang aktif hanya 1 modem saja.
Apa ada dari kawan-kawan yang bisa membantu.
berikut ini configurasi di nya
/etc/gammu-smsdrc

[gammu]
port = /dev/ttyUSB0
connection = at115200
logfile = /var/log/gammu/gammu.log
logformat = textall

[gammu1]
model =
port = /dev/ttyUSB1
connection = at115200
logfile = /var/log/gammu/gammu.log
logformat = textall

[gammu2]
model =
port = /dev/ttyUSB2
connection = at115200
logfile = /var/log/gammu/gammu.log
logformat = textall


[smsd]
Service = files
InboxPath = /var/spool/gammu/inbox/
OutboxPath = /var/spool/gammu/outbox/
SentSMSPath = /var/spool/gammu/sent/
ErrorSMSPath = /var/spool/gammu/error/
InboxFormat = unicode
OutboxFormat = unicode
TransmitFormat = auto
debugLevel = 1
LogFile = /var/log/gammu/smsd.log
DeliveryReport = sms
DeliveryReportDelay = 7200
CheckSecurity = 0