Check the link between you and OpenMarket

The enquire_link operation checks the communication link between you and OpenMarket. enquire_link can be initiated by either you or by OpenMarket. It uses enquire_link PDU to check the communication and returns enquire_link_resp PDU parameters with the status.

enquire_link PDU

Note: OpenMarket recommends that you send enquire_link PDUs every 20 seconds if your application is not actively submitting messages.

enquire_link PDU parameters

Parameter

Description

Command Length

Length of the PDU in octets.


Size: 4

Type: Integer

Value: Customer-supplied

Command ID

Identifies the type of message the SMPP PDU represents.


Size: 4

Type: Integer

Value:0x15

Command Status

Not used. Set to 0x00 (NULL).


Size: 4

Type: Integer

Value: 0x00

Sequence Number

A customer-set unique sequence number. The associated enquire_link response PDU will echo this sequence number back.


Size: 4

Type: Integer

Value: Customer-supplied

enquire_link_resp PDU parameters

Parameter

Description

Command Length

Length of the PDU in octets.


Size: 4

Type: Integer

Value: Customer-supplied

Command ID

Identifies the type of message the SMPP PDU represents.


Size: 4

Type: Integer

Value: 0x15

Command Status

Not used. Set to 0x00 (NULL).


Size: 4

Type: Integer

Value: 0x00

Sequence Number

The customer-set unique sequence number echoed back from the enquire_link operation.

Size: 4

Type: Integer

Value: Customer-supplied