Error getting send status of message (UNKNOWN[27]) playsms

Good evening excuse my English because I'm using google translator, I
actually speak Portuguese.
I have a Ubuntu server with Gammu + Playsms and works to send a single
message.
But if you send to a list or more than one or two sms it starts giving
errors. I've tried many things but I have no more idea what to do, follows
some logs

Tue 2016/05/03 14:33:53 gammu-smsd[3814]: Found 2 sms to "5521979669061"
with text "teste 2 5 " cod 3 lgt 153 udh: t 2 l 6 dlr: 1 fls: -1
Tue 2016/05/03 14:33:53 gammu-smsd[3814]: New message to send:
OUTA20160503_143341_00_5521979669061_25100011100010.txtd
Tue 2016/05/03 14:33:54 gammu-smsd[3814]: SMS sent on device:
"/dev/ttyUSB0" status=0, reference=0
Tue 2016/05/03 14:33:54 gammu-smsd[3814]: Transmitted
OUTA20160503_143341_00_5521979669061_25100011100010.txtd (part: 1) to
5521979669061, message reference 0x00
Tue 2016/05/03 14:35:10 gammu-smsd[3814]: SMS sent on device:
"/dev/ttyUSB0" status=0, reference=98
Tue 2016/05/03 14:35:10 gammu-smsd[3814]: Transmitted
OUTA20160503_143341_00_5521979669061_25100011100010.txtd (total: 2) to
5521979669061, message reference 0x62

Tue 2016/05/03 14:35:11 gammu-smsd[3814]: Found 2 sms to "5521979669061"
with text "teste 2 5 " cod 3 lgt 153 udh: t 2 l 6 dlr: 1 fls: -1
Tue 2016/05/03 14:35:11 gammu-smsd[3814]: New message to send:
OUTA20160503_143345_00_5521979669061_26100011100010.txtd
Tue 2016/05/03 14:35:14 gammu-smsd[3814]: SMS sent on device:
"/dev/ttyUSB0" status=0, reference=99
Tue 2016/05/03 14:35:14 gammu-smsd[3814]: Transmitted
OUTA20160503_143345_00_5521979669061_26100011100010.txtd (part: 1) to
5521979669061, message reference 0x63

Tue 2016/05/03 14:35:15 gammu-smsd[3814]: SMS sent on device:
"/dev/ttyUSB0" status=-1, reference=-1
Tue 2016/05/03 14:35:15 gammu-smsd[3814]: Error getting send status of
message: Erro desconhecido. (UNKNOWN[27])
Tue 2016/05/03 14:35:16 gammu-smsd[3814]: Found 2 sms to "5521979669061"
with text "teste 2 5 " cod 3 lgt 153 udh: t 2 l 6 dlr: 1 fls: -1
Tue 2016/05/03 14:35:16 gammu-smsd[3814]: New message to send:
OUTA20160503_143348_00_5521979669061_27100011100010.txtd
Tue 2016/05/03 14:35:18 gammu-smsd[3814]: SMS sent on device:
"/dev/ttyUSB0" status=0, reference=101
Tue 2016/05/03 14:35:18 gammu-smsd[3814]: Transmitted
OUTA20160503_143348_00_5521979669061_27100011100010.txtd (part: 1) to
5521979669061, message reference 0x65

Tue 2016/05/03 14:35:19 gammu-smsd[3814]: SMS sent on device:
"/dev/ttyUSB0" status=-1, reference=-1
Tue 2016/05/03 14:35:19 gammu-smsd[3814]: Error getting send status of
message: Erro desconhecido. (UNKNOWN[27])
Tue 2016/05/03 14:35:20 gammu-smsd[3814]: Found 2 sms to "5521979669061"
with text "teste 2 5" cod 3 lgt 153 udh: t 2 l 6 dlr: 1 fls: -1
Tue 2016/05/03 14:35:20 gammu-smsd[3814]: New message to send:
OUTA20160503_143351_00_5521979669061_28100011100010.txtd
Tue 2016/05/03 14:36:23 gammu-smsd[3814]: Error getting send status of
message: Sem resposta no tempo especificado. Provávelmente celular
desconectado.[B] (TIMEOUT[14])[/B]
Tue 2016/05/03 14:36:23 gammu-smsd[3814]: SMS sent on device:
"/dev/ttyUSB0" status=0, reference=-1


Tue 2016/05/03 14:36:33 gammu-smsd[3814]: Found 2 sms to "5521979669061"
with text "teste 2 5" cod 3 lgt 153 udh: t 2 l 6 dlr: 1 fls: -1
Tue 2016/05/03 14:36:33 gammu-smsd[3814]: New message to send:
OUTA20160503_143357_00_5521979669061_30100011100010.txtd
Tue 2016/05/03 14:36:35 gammu-smsd[3814]: SMS sent on device:
"/dev/ttyUSB0" status=0, reference=105
Tue 2016/05/03 14:36:35 gammu-smsd[3814]: Transmitted
OUTA20160503_143357_00_5521979669061_30100011100010.txtd (part: 1) to
5521979669061, message reference 0x69
Tue 2016/05/03 14:36:36 gammu-smsd[3814]: SMS sent on device:
"/dev/ttyUSB0" status=-1, reference=-1
Tue 2016/05/03 14:36:36 gammu-smsd[3814]: Error getting send status of
message: Erro desconhecido. [B](UNKNOWN[27])[/B]

Tue 2016/05/03 14:36:37 gammu-smsd[3814]: Found 2 sms to "5521979669061"
with text "teste 2 5" cod 3 lgt 153 udh: t 2 l 6 dlr: 1 fls: -1
Tue 2016/05/03 14:36:37 gammu-smsd[3814]: New message to send:
OUTA20160503_143400_00_5521979669061_31100011100010.txtd
Tue 2016/05/03 14:36:38 gammu-smsd[3814]: SMS sent on device:
"/dev/ttyUSB0" status=0, reference=107
Tue 2016/05/03 14:36:38 gammu-smsd[3814]: Transmitted
OUTA20160503_143400_00_5521979669061_31100011100010.txtd (part: 1) to
5521979669061, message reference 0x6b
Tue 2016/05/03 14:36:40 gammu-smsd[3814]: SMS sent on device:
"/dev/ttyUSB0" status=0, reference=108
Tue 2016/05/03 14:36:40 gammu-smsd[3814]: Transmitted
OUTA20160503_143400_00_5521979669061_31100011100010.txtd (total: 2) to
5521979669061, message reference 0x6c

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