Try using tcp port 400x instead of port 200x. 

On Mar 24, 2011, at 9:17 PM, "Chubby" <chubby_cri...@yahoo.com> wrote:

> Hi Andrew,
> 
> This is a reverse telnet session that communicate using Serial <> TCP
> 
> 0xFF is part of data payload, and I can not find a way to double the content 
> of payload ie: "0xFF 0xFF"
> 
> The config is:
> Line 0/0/0
> No exec
> Exec-timeout 0 0
> Data-character-bits 8
> Exec-character-bit 8
> Transport input all
> Telnet transparent
> Telnet refuse-negotiation
> !
> 
> Best Regards,
> 
> Ranokarno
> Powered by NCS
> 
> On Mar 25, 2011, at 2:48 AM, Andrew Gray <4...@blargh.com> wrote:
> 
>> This sounds like you're telnet'ing in with something other than telnet - 
>> 0xFF is the Telnet escape character - it's expecting another control code 
>> after 0xFF to negotiate options and such.  To send a single 0xFF onward, you 
>> need to double it, i.e. 0xFF 0xFF. 
>> Rano Karno writes: 
>>> the issue is whenever server make a session to terminal host and sending 
>>> "FF" hexa, it seem the router did not transmit it to terminal host, thus 
>>> make the system hang.
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