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Upgrading Polycom CX700 Phone within a Microsoft Office Communications Server 2007 R2 Environment
25
DNS Type Name Port IP Address / FQDN
Internal Zone
<SIPDomain>
A sip.<SIPDomain> N/A IP/VIP of Pool running Device
Update.
A autodiscover.<SIPDomain> 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.<SIPDomain> 5061 FQDN of Pool containing user(s)
signing into the OCPE device
being upgraded.
SRV _ntp._udp.<SIPDomain> 123 time.windows.com or FQDN of
internal or external time source
Internal Zone
<DHCPDomain>
A ucupdates-r2.<DHCPDomain> N/A IP/VIP of Pool running Device
Update.
A poolName.<DHCPDomain> N/A IP/VIP of Pool running Device
Update.
External Zone
<SIPDomain>
A sip.<SIPDomain> N/A External IP/VIP of Access Edge
server.
A autodiscover.<SIPDomain> 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.<SIPDomain> N/A IP of reverse proxy specified in
the ExternalBaseURL WMI
setting.
SRV _sip._tls.<SIPDomain> 443 FQDN of Access Edge server.
SRV _ntp._udp.<SIPDomain> 123 time.windows.com or FQDN of
external time source
External Zone
<DHCPDomain>
A ucupdates-r2.<DHCPDomain> 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 <DHCPDomain> 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).