SMPP connectivity
Sinch supports TLS encryption to ensure secure connectivity to the SMPP servers. As most client SDKs for SMPP do not natively support TLS integrations, you may need a tunnel solution to configure a secure connection between your client and our server.
SMPP account details
An SMPP account consists of a regional host connected to TLS port 3601, a system_id, and a password to consume our services. Be sure to use the correct region for your host.
| Account detail | Input |
|---|---|
| Hosts |
US - EU - Australia - Brazil - Canada - |
| Port | TLS port 3601 |
| System ID | system-id |
| Password | password |
By default, only two parallel connections per host/system_id combination are allowed. If your application requires more parallel connections, please reach out to your account manager.
IP access
Access to the Sinch SMPP servers is by default restricted to pre-registered IPs. The client IP range must be announced and added to the client account for access.
Supported SMP PDUs
| SMPP PDU from client | SMPP PDU from server |
|---|---|
bind_transmitter |
bind_transmitter_resp |
bind_receiver / bind_receiver_resp |
bind_receiver_resp |
bind_transceiver / bind_transceiver_resp |
bind_transceiver_resp |
enquire_link / enquire_link_resp |
enquire_link / enquire_link_resp |
unbind / unbind_resp |
unbind / unbind_resp |
submit_sm |
submit_sm_resp |
data_sm / data_sm_resp |
|
deliver_sm_resp |
deliver_sm |
generic_nack |
|
query_sm / query_sm_resp |
|
cancel_sm / cancel_sm_resp |
|
replace_sm / replace_sm_resp |
Throughput and throttling
Throughput is the maximum number of MT messages per second that can be sent via the SMPP account on the Sinch server.
- The default value is 10 per bind .
- To increase this value, contact your account manager .
The recommended default window size (maximum open requests) is 10.
The operator receiving the MT messages may have capacity limits. If so, it will restrict the overall throughput to a destination operator. For this reason, if any sorting of destination numbers is done, it is recommended to sort by last digit(s) as this will ensure a better distribution across various destination networks then when sorting by first digit.
Enquire link
It's recommended to set enquire_link requests to 30 seconds.
Time zone
Sinch SMSC uses UTC (Coordinated Universal Time)
MSISDN Format
In GSM, MSISDN is built up as:
| MSISDN | CC + NDC + SN |
|---|---|
| CC | Country Code |
| NDC | National Destination Code |
| SN | Subscriber Number |
For further information on the MSISDN format, see the ITU-T specification E.164.
Next step
Review the sending messages SMPP documentation.
