Increase/Add RMAN Channel

Hi,

We're using OIP for our daily level0 backup which took approximately 3.5-4hrs. As per checking the log generated by the backup in the console, there was only one channel allocated. Is it possible to increase the channel used by OIP? Thank you

# -----------------------------------------------------------------
# RMAN command section
# -----------------------------------------------------------------
RUN {
ALLOCATE CHANNEL ch00 
    TYPE 'SBT_TAPE'
    PARMS 'SBT_LIBRARY=/usr/openv/netbackup/bin/libobk.so64.1';
SEND 'NB_ORA_CLIENT=proddb01.domain.com,NB_ORA_SID=PRODDB,NB_ORA_SERV=prodvnb.domain.com,NB_ORA_POLICY=PRODDB_PROD_DB_BKP,NB_ORA_PARENT_JOBID=42853,NB_ORA_SCHED=PRODDB_Daily_Full_Schedule';
BACKUP
    INCREMENTAL LEVEL=0
    FORMAT 'bk_d%d_u%u_s%s_p%p_t%t'
    DATABASE;
RELEASE CHANNEL ch00;
# Backup Archived Logs
sql 'alter system archive log current';
ALLOCATE CHANNEL ch00 
    TYPE 'SBT_TAPE'
    PARMS 'SBT_LIBRARY=/usr/openv/netbackup/bin/libobk.so64.1';
SEND 'NB_ORA_CLIENT=proddb01.domain.com,NB_ORA_SID=PRODDB,NB_ORA_SERV=prodvnb.domain.com,NB_ORA_POLICY=PRODDB_PROD_DB_BKP,NB_ORA_PARENT_JOBID=42853,NB_ORA_SCHED=PRODDB_Daily_Full_Schedule';
BACKUP
    FORMAT 'arch_d%d_u%u_s%s_p%p_t%t'
    ARCHIVELOG
        ALL
DELETE INPUT;
RELEASE CHANNEL ch00;
# Control file backup
ALLOCATE CHANNEL ch00 
    TYPE 'SBT_TAPE'
    PARMS 'SBT_LIBRARY=/usr/openv/netbackup/bin/libobk.so64.1';
SEND 'NB_ORA_CLIENT=proddb01.domain.com,NB_ORA_SID=PRODDB,NB_ORA_SERV=prodvnb.domain.com,NB_ORA_POLICY=PRODDB_PROD_DB_BKP,NB_ORA_PARENT_JOBID=42853,NB_ORA_SCHED=PRODDB_Daily_Full_Schedule';
BACKUP
    FORMAT 'ctrl_d%d_u%u_s%s_p%p_t%t'
    CURRENT CONTROLFILE;
RELEASE CHANNEL ch00;
}

Note: Apologies if this thread might appear duplicate. I've created same thread earlier but I can't find the original one. I'm not sure if I posted/created it successfully.