Call Quality Methodology – a practical approach

Want to know more about Call Quality Methodology? It's time to go through the updated version of Lync Server Networking Guide v2.


What is CQM?

CQM is a holistic way to systematically define and assert call quality based upon the methods outlined in the Networking Guide. CQM divides a Lync implementation into ten discrete areas that impact quality, defining targets and a remediation plan for each one. CQM is a framework to tackle call quality problems – you can modify or extend it to address the particular conditions on your network.

For more details: http://blogs.technet.com/b/nexthop/archive/2013/10/21/announcing-the-release-of-the-lync-server-networking-guide-v2.aspx

Configuring DHCP scope options for Lync phone in non-windows environment

Dealing non-windows environment has always been exciting for a windows professional. A non-windows DHCP server can be configured with hex value to support Lync phone login.  Usually this is what you configure in Windows DHCP server.

Option Number	Option Name	String Value
1	UCIdentifier	MS-UC-Client
2	URLScheme	https
3	WebServerFQDN	Lyncweb.contoso.com
4	WebServerPort	443
5	CertProvRelPath	CertProv/CertProvisioningService.svc
120	SIP-Servers	lyncpool.contoso.com

 

Which you can convert to hex using any online string to hex converter. However it may not be sufficient. During an engagement I used several string to hex converters, but of no use. Finally I used the tool which I should have used at first go; DHCPUtil.exe. :)
 
Located DHCPUtil.exe on Lync server (%ProgramFiles%\Common Files\Microsoft Lync Server 2013) command prompt. Ran following command.

DHCPUtil.exe -SipServer lyncpool.contoso.com -WebServer lyncweb.contoso.com >Hex.txt

It created a file Hex.txt under %ProgramFiles%\Common Files\Microsoft Lync Server 2013. This file has corresponding hex values for DHCP scope options. We could login in Lync phone clients (hard reboot is required) successfully after configuring the DHCP server with HEX values.

For detailed instruction on how to configure DHCP scope options for Lync phone client: http://blog.schertz.name/2010/12/configuring-lync-server-for-phone-edition-devices/
 

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