Change the maximum length of short message to 254 (SMPP spec v 3.4)
Change the maximum length of short message to 254 (SMPP spec v 3.4)

opentelecoms-org/jsmpp,kamslooce/jsmpp,openam-org-ru/org.jsmpp,chscorpio/jsmpp,openam-org-ru/org.jsmpp,amdtelecom/jsmpp,chscorpio/jsmpp,pmoerenhout/jsmpp-1,jojoaddison/jsmpp,kamslooce/jsmpp,pmoerenhout/jsmpp-1,jojoaddison/jsmpp,opentelecoms-org/jsmpp,uudashr/jsmpp,amdtelecom/jsmpp,uudashr/jsmpp