> For the complete documentation index, see [llms.txt](https://smsc.revicom.ltd/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://smsc.revicom.ltd/how-to-work-with-smsc/smpp-parameters.md).

# SMPP parameters

Below are the parameters required to connect to the SMSC service. They are provided by Revicom and specified in the SMPP client settings.

| **Parameter**     | **Description**                          |
| ----------------- | ---------------------------------------- |
| **system\_id**    | User name (login) to connect to the SMSC |
| **smsc-password** | Password to connect to the SMSC          |
| **host**          | smpp.revicom.ltd                         |
| **port**          | Port to connect to the SMSC              |

{% hint style="info" %}
**IMPORTANT**:

* recommended transfer rate: no more than 100 PDU/sec;
* maximum response packet wait time (wait time for an ENQUIRE\_LINK\_RESP packet): 30 sec;
* timeout in case of unsuccessful connection: 60 sec;
* the length of the sender ID must not exceed 11 characters;
* the subscriber’s number (destination\_addr) is transmitted in the E.164 format without the “+” at the beginning;
* phone numbers of RF operators must start with the number 7 (for example, 79111234567); never use the character “8” instead of “7” at the beginning of the number.
  {% endhint %}