model dsl-2640u
p/n: RSL 2640uEBRU3C1
H/W VER: C1
F/W VER:RU_1.00
S/N PJ0H18A040883
dhcp not rleasing problem. i would like update my firmware,when i trying to update fatel error coming. so pls let me know right firmawre,region is united arab emirates.....