# IMGT_SERVICE_IN

Indicates the ISDN stack has received a SERVICE message from the remote end.

#### Related structure

struct imgt_service
{
BYTE type; /* Either trunk or a individual B Channel */
BYTE nai; /* Network Access Identifier */
BYTE BChannel; /* B Channel */
BYTE status; /* Either IMGT_IN_SERVICE, IMGT_MAINTENANCE,
or IMGT_OUT_OF_SERVICE */
};

Field | Description | 4 E S S | E 1 0 | N I 2 | D M S | E T S I | V N 6 | H K G | A U S T E L 1 | N T T | K O R E A | T A I W A N | Q S I G | D P N S S | T 1 6 0 7
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
type | PREFERENCE_TRUNK PREFERENCE_BCHANNEL | x | x x | x | x |  |  |  |  |  |  |  |  |  | x
nai | Network access identifier | x | x | x | x |  |  |  |  |  |  |  |  |  | x
BChannel | B channel number | x | x | x | x |  |  |  |  |  |  |  |  |  | x
status | B channel status: IMGT_IN_SERVICE IMGT_MAINTENANCE IMGT_OUT_OF_SERVICE | x | x | x | x |  |  |  |  |  |  |  |  |  | x

Note: E10 is the same variant as 5ESS.

#### Details

If the type field is set to PREFERENCE_TRUNK, ignore the BChannel field.