DBL Technology Co., Ltd. GoIP User Manual
www.dbltek.com Technical Support: support@dbltek.com
Appendix B. SMS To VoIP
The device receives SMS messages from both GSM and VoIP networks and they are handled according to the
modes defined below.
1. Call Function – In this mode, a received SMS is used to implement the “Call Back” function. The concept
is to establish a phone call between the called party and the calling party. The phone number of the called
party is specified in the GSM SMS message received. The phone number of the calling party is the SMS
sender’s number. The device then sends a SIP INVITE message containing these phone numbers to the SIP
Server registered. Three different SIP INVITE message formats are supported and are described below.
a) Mode 1
SIP Message format:
The “To” field in the SIP INVITE message contains the phone number of the called party.
The “From” field contains the phone number of the calling party.
Once the SIP server receives these two numbers via a SIP INVITE message, it then terminates the SIP call
(SIP INVITE) and then call both parties via its own phone network. The device may or may not take part
in the actual call conversation.
Example:
SMS content = 8675588228822
Sender’s number = 861380000000
SIP Server IP = 192.168.2.1
SIP Number = 20001
The INVITE message sent to the SIP Server is:
INVITE sip:8675588228822@192.168.2.1:5060;transport=udp SIP/2.0
Via: SIP/2.0/UDP 192.168.2.237:5060;branch=z9hG4bK363969813
From: <sip:8613800000000@192.168.2.1:5060>;user=phone;tag=65248630
To: <sip:8675588228822@192.168.2.1>
Call-ID: 117025903@192.168.2.237
CSeq: 2 INVITE
Contact: <sip: 8613800000000@192.168.2.237:5060>
Max-Forwards: 30
User-Agent: DBL
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, NOTIFY, REFER, REGISTER, MESSAGE, INFO, SUBSCRIBE
Content-Type: application/sdp
Content-Length: 226
b) Mode 2
SIP Message format:
The “To” field in the SIP INVITE message contains the phone number of the called party.
The “From” field contains the SIP number of the line that is associated with the GSM channel
Note: The VoIP configuration of the device must be set to “Config. By Line mode”.
Only the phone number of the called party is passed to the SIP server via a SIP INVITE message. This
mode is designed to use the GSM channel of the device to complete the Call Back function. Therefore,
the Call OUT via GSM parameter of the device must be enabled and the Forward Number associated
with this parameter is set to the phone number of the SMS sender.
https://arttel.ru/
https://arttel.ru/shop/gsm-shlyuzy/gsm-shlyuz-goip-4
To Next Page
Loading...
Need help?
General
