3com V7300 ユーザーズマニュアル

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Network Time Protocol (NTP) Configuration
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oscillator to stratum 8 in order to allow the two systems to use a lower 
stratum server (7 or lower) if one is available. By default, the system uses 
this drift file: /etc/ntp/drift.
On the voipbox2 system, create the /etc/ntp.conf file.
Edit the file and add these lines:
server 127.127.1.1
peer voipbox1
On the voipbox1 server, su to root and execute these commands:
/etc/init.d/ntpd stop
/etc/init.d/ntpd start
On the voipbox2 server, su to root and execute the same commands:
/etc/init.d/ntpd stop
/etc/init.d/ntpd start
Optionally, you can add any number of additional server entries in the 
ntp.conf file.
Verification
To verify that the NTP service is properly configured, run this command:
ntpq -p
Any user can run the ntpq command.
The output from this command shows the state of all of the ntp 
servers with which the local system is communicating.