First of all, I may misunderstanding about RNR (Receive Not Ready) function, substantially there might not be concept of sending interval for RNR though, I posted it to clear my question.
HOST ---- STUN/SDLC ---- Cisco 2621XM (IOS version 12.1.19)
Above environment, HOST has received RNR from Cisco 2621XM every 20 msec.
Can I change the interval of sending RNR on Cisco Router ?
Your information would be appreciated.