Question : Cisco 1720 Not Saving Commands to File?

Hi

I am in the process of change from a Netopia 4500 t1 vpn router to a cisco 1720 with t1 dsu/csu.

when i run the setup config that sets it up for B8ZS and ESF it shows it in the config output before it asks me to save. once saved it disappears from the config. if  i put it in manually after it accepts the command but still does not add it. why is this?

the config i WANT to put in is:

interface Serial 0
 no shutdown
 description connected to Internet
 service-module t1 clock source line  --missing
 service-module t1 data-coding normal --missing
 service-module t1 remote-loopback full --missing
 service-module t1 framing esf --missing
 service-module t1 linecode b8zs --missing
 service-module t1 lbo none --missing
 service-module t1 remote-alarm-enable
 ip address xxx.xxx.xxx.xxx 255.255.255.252
 encapsulation hdlc

the ONLY one that keeps is    remote-alarm-enable

????????????thanks

Answer : Cisco 1720 Not Saving Commands to File?

OK, what do you get with "show interface" -
 Serial 0 up line protocol down
 
up / down = ppp negotiation not happing or wrong encapsulation
down / down = channel assignments or other layer 1 connectivity issue
up / up = should be good to go

If you have up/up then you should be able to ping the next hop
If you can't ping, then you're looking at a L3 IP addressing issue. Perhaps wrong IP address on the interface?
If it doesn't work immediately, wait 5 minutes or so and let the upstream router's arp cache clear out..