Upgrading Polycom CX700 Phone within a Microsoft Office Communications Server 2007 R2 Environment
Domain\User name: contoso.com\ocstest1(contoso.com represents <DHCPDomain> in this document)
<SIPDomain> and <DHCPDomain> are used as placeholders to distinguish between the domain used in the
•<SIPDomain>
This is the SIP domain of the user that’s signing into the OCPE device and is the same one they use when signing into their MOC client.
•<DHCPDomain>
This is the domain assigned by DHCP Option 015 DNS Domain Name and is usually the NetBIOS name of the domain containing the pool running the Device Update service. Domain\User name is analogous to the account the user signs in to Active Directory with.
In some environments the <SIPDomain> and <DHCPDomain> values will be the same but they are purposely kept different in the examples used here to highlight the issues that arise as a result of them being different.
For example; depending on the firmware version, a phone will look in <SIPDomain> for the _ntp._udp SRV record but in <DHCPDomain> for locating a domain controller to use for LDAP queries. And to make it more confusing, and the phone will occasionally query DNS using a combination of <SIPDomain>.<DHCPDomain> (e.g., _sipinternal._tcp.fabrikam.com.contoso.com) as sort of a catchall query.
Although some phone queries concatenate <SIPDomain> and <DHCPDomain> It is not necessary to create any corresponding concatenated DNS records in order to upgrade a Polycom CX700 phone. Refer to the table in Step 1.2 - Configure DNS on page
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