RC7620 TCP connection problem

no problem is found:

ati3                                    
Manufacturer: Sierra Wireless, Incorporated
Model: RC7620-1                         
Revision: SWI9X07H_00.08.07.00 0ce4c1 jenkins 2021/03/17 02:18:20
IMEI: 001027009999999                   
IMEI SV: 17                             
FSN: 7T9483000706AA                     
+GCAP: +CGSM                            
                                        
OK
at!gtatus?
ERROR
at!gstatus?                                                                     
!GSTATUS:                                                                       
Current Time:  897              Temperature: 34                                 
Modem Mitigate Level: 0         ModemProc Mitigate Level: 0                     
Reset Counter: 2                Mode:        ONLINE                             
System mode:   LTE              PS state:    Attached                           
IMS reg state: UNKNOWN          IMS mode:    Not Support                        
IMS Srv State: UNKNOWN SMS,UNKNOWN VoIP                                         
LTE band:      B1               LTE bw:      15 MHz                             
LTE Rx chan:   374              LTE Tx chan: 18374                              
LTE CA state:  INACTIVE                                                         
EMM state:     Registered       Normal Service                                  
RRC state:     RRC Idle                                                         
                                                                                
PCC RxM RSSI:  -55              RSRP (dBm):  -91                                
PCC RxD RSSI:  -89              RSRP (dBm):  -127                               
Tx Power:      --               TAC:         2775 (10101)                       
RSRQ (dB):     -16              Cell ID:     00360A20 (3541536)                 
SINR (dB):      2.8                                                             
                                                                                
OK                                                                              
AT+KCNXCFG=1,"GPRS","smartone"                                                  
OK                                                                              
AT+KCNXPROFILE=1                                                                
OK                                                                              
AT+KTCPCFG=1,0,"123.123.123.123",5044                                           
                                                                                
+KTCPCFG: 1                                                                     
                                                                                
OK                                                                              
at+ktcpcnx=1                                                                    
OK                                                                              
                                                                                
                                                                                
+KCNX_IND: 1,4,1                                                                
                                                                                
                                                                                
                                                                                
+KCNX_IND: 1,1,0                                                                
                                                                                
                                                                                
                                                                                
+KTCP_IND: 1,1