Polycom 1725-31424-001 - Manual (Page 31)

Upgrading Polycom CX700 Phone within a Microsoft Office Communications Server 2007 R2 Environment
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DNS Type Name Port IP Address / FQDN
Internal Zone A sip. N/A IP/VIP of Pool running Device
Update.
A autodiscover. N/A Internal IP/VIP of Exchange
server running CAS role. Note:
this assumes SIP URI matches
the user’s Primary SMTP
address in Exchange.
SRV _sipinternaltls._tcp. 5061 FQDN of Pool containing user(s)
signing into the OCPE device
being upgraded.
SRV _ntp._udp. 123 time.windows.com or FQDN of
internal or external time source
Internal Zone A ucupdates-r2. N/A IP/VIP of Pool running Device
Update.
A poolName. N/A IP/VIP of Pool running Device
Update.
External Zone A sip. N/A External IP/VIP of Access Edge
server.
A autodiscover. N/A External IP/VIP of Exchange
server running CAS role. Note:
this assumes SIP URI matches
the user’s Primary SMTP
address in Exchange.
A reverseProxyFQDN. N/A IP of reverse proxy specified in
the ExternalBaseURL WMI
setting.
SRV _sip._tls. 443 FQDN of Access Edge server.
SRV _ntp._udp. 123 time.windows.com or FQDN of
external time source
External Zone A ucupdates-r2. N/A IP of reverse proxy specified in
the ExternalBaseURL WMI
setting.
Polycom CX700 phones running release 1.0.199.123 look for time.windows.com by
default and use it if it's reachable. If not, they append to
time.windows.com and try again (e.g. time.windows.com.contoso.com).
Polycom CX700 phones running 3.5.6907.35 use SRV records to locate a time
source but also checks for a time.windows.com A record for reporting its time back
to the pool (applies to 1.0.199.123 and 1.0.522.101 also).