Analog phone no calling out

[Volodymyr Khrystenko]

Hello)

I have the next scheme:

analog phone --- FXS (cisco 2901) ----IP----(cisco 4451x) --- Telephony Provider

I can not call from analog phone to anyone((( When I dial, nothing happens. However 4451x gets incoming call((( Any suggestions?

[rus-admin]

Few information.

Check your firewall/nat settings. May be RTP/SIP (or another signalization protocol) doesn't go between cisco 2901 and cisco 4451x.