Planning and Installation Guide Chapter 9: Network Requirements and Preparation
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Step 8 Set the value of option 156 to:
ftpservers=ip address, Layer2Tagging=N, VlanId=X
FtpServers always needs to be set to a ShoreWare server and is a pre-existing
parameter.
Layer2Tagging is a new parameter.
Purpose: enable/disable 802.1Q, default is disabled
Format: Layer2Tagging=N
where N=0 is disable, N=1 is enable
VlanId is a new parameter.
Purpose: VLAN id when 802.1Q is enabled, default is zero
Format: VlanId=X
where X is a VLAN id between 0 and 4094
E.g., the following would enable VLAN tagging using a VLAN id of 10:
FtpServers=192.168.0.13,Layer2Tagging=1,VlanId=10
9.9 Time Services
When IP phones are used, time services must be available to maintain the telephone’s date
and time display. This requires a server that supports the Simple Network Time Protocol
(SNTP).
If you do not run an NTP server within your organization, you may use a public accessible
time servers used by the NIST Internet Time Service (ITS), shown in Table 9-14.1
In addition, you must configure your DHCP server to provide the correct GMT offset to the
IP phones at each site. See Section 16.4 on page 229 for more information.
1. This list was obtained at http://www.boulder.nist.gov/timefreq/service/time-servers.html
Name IP Address Location
time-a.nist.gov 129.6.15.28 NIST, Gaithersburg, Maryland
time-b.nist.gov 129.6.15.29 NIST, Gaithersburg, Maryland
time-a.timefreq.bldrdoc.gov 132.163.4.101 NIST, Boulder, Colorado
time-b.timefreq.bldrdoc.gov 132.163.4.102 NIST, Boulder, Colorado
time-c.timefreq.bldrdoc.gov 132.163.4.103 NIST, Boulder, Colorado
utcnist.colorado.edu 128.138.140.44 University of Colorado, Boulder
time.nist.gov 192.43.244.18 NCAR, Boulder, Colorado
time-nw.nist.gov 131.107.1.10 Microsoft, Redmond, Washington
nist1.symmetricom.com 69.25.96.13 Symmetricom, San Jose, California
nist1-dc.glassey.com 216.200.93.8 Abovenet, Virginia
nist1-ny.glassey.com 208.184.49.9 Abovenet, New York City
Table 9-14 NTP Time Servers
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