18 channels for DSM2 / DSMX ?

name=Model17
mixermode=Advanced
[radio]
protocol=DSM2
num_channels=20
fixed_id=123456
tx_power=10mW

[protocol_opts]
Telemetry=Off
Resolution=Steps:2048
X-Plus=On

const void *DSM2_Cmds(enum ProtoCmds cmd)
{
    switch(cmd) {
        case PROTOCMD_INIT:  initialize(0); return 0;
        case PROTOCMD_DEINIT: return 0;
        case PROTOCMD_CHECK_AUTOBIND: return 0; //Never Autobind
        case PROTOCMD_BIND:  initialize(1); return 0;
        case PROTOCMD_NUMCHAN:
            if (Model.proto_opts[PROTOOPTS_XPLUS] == XPLUS_ON) {
                if (Model.num_channels < 13)
                    Model.num_channels = 13;
                Model.proto_opts[PROTOOPTS_RESOLUTION] = RESOLUTION_2048;
            }
            if ((Model.num_channels < 8) && (Model.protocol == PROTOCOL_DSM2))
                Model.proto_opts[PROTOOPTS_RESOLUTION] = RESOLUTION_1024;
            return (void *)(Model.proto_opts[PROTOOPTS_XPLUS] == XPLUS_ON ? 20L : 12L);
        case PROTOCMD_DEFAULT_NUMCHAN: return (void *)7L;
        case PROTOCMD_CURRENT_ID: return Model.fixed_id ? (void *)((unsigned long)Model.fixed_id) : 0;
        case PROTOCMD_GETOPTIONS:
            if (Model.protocol == PROTOCOL_DSMX)
                Model.proto_opts[PROTOOPTS_RESOLUTION] = RESOLUTION_2048;
            return dsm_opts;
        case PROTOCMD_SETOPTIONS:
            if (Model.protocol == PROTOCOL_DSMX)
                Model.proto_opts[PROTOOPTS_RESOLUTION] = RESOLUTION_2048;
            if (Model.proto_opts[PROTOOPTS_XPLUS] == XPLUS_ON) {
                if (Model.num_channels < 13)
                    Model.num_channels = 13;
                Model.proto_opts[PROTOOPTS_RESOLUTION] = RESOLUTION_2048;
            }
            if ((Model.num_channels < 8) && (Model.protocol == PROTOCOL_DSM2))
                Model.proto_opts[PROTOOPTS_RESOLUTION] = RESOLUTION_1024;
            break;
        case PROTOCMD_TELEMETRYSTATE:
            return (void *)(Model.proto_opts[PROTOOPTS_TELEMETRY] == TELEM_ON ? 1L : 0L);
        case PROTOCMD_RESOLUTIONSTATE:
            return (void *)(Model.proto_opts[PROTOOPTS_RESOLUTION] == RESOLUTION_2048 ? 1L : 0L);
        case PROTOCMD_XPLUSSTATE:
            return (void *)(Model.proto_opts[PROTOOPTS_XPLUS] == XPLUS_ON ? 1L : 0L);
        default: 
            break;
    }
    return NULL;
}