Cisco CUCM – Multiple Extensions

When you add users and extensions to the Cisco Unified Communications Management (CUCM) system, make sure you have adequate licensing to proceed. The Q-SYS Core is a third-party SIP endpoint in the CUCM system, and therefore each extension may require available licenses. Purchase any needed licenses from Cisco.

The number of Softphones you can have in a design is determined by the Q-SYS Core processor model.

Maximum Softphones per Design

Note: Q-SYS Scaling Licenses expand the capabilities of some Q-SYS Core processor models. Refer to the Licensing topic for more information.

Core Model	Max Softphones
NV-32-H (Core Mode)	1
Core Nano	2
Core 8 Flex	2
Core 110f	4
Core 110c	1
Core 510i	64
Core 510c	4
Core 5200	64
Discontinued
Core 250i	64
Core 500i	64
Core 1100	64
Core 3100	64

Refer to these procedures in the Cisco CUCM – Single Extension topic if you have not previously configured CUCM:

• Security Profile

• Add an End User

• SIP Profile

Refer to the Add and Configure a Softphone in CUCM procedure in the Cisco CUCM – Single Extension topic for guidance. However, for a multi-phone setup, note that:

• You will only configure a single device for all Directory Numbers (DNs).

• The phone type to use is "Third Party SIP Device (Advanced)" instead of "Third Party SIP Device (Basic)".

An example with four phones is shown below:

For each line, add a Directory Number (DN). Refer to the Add a Directory Number procedure in the Cisco CUCM – Single Extension topic for guidance and repeat for each line/softphone.

The Q-SYS Softphones are each associated with lines in CUCM. Use Q-SYS Core Manager to configure each softphone.

1. Open Q-SYS Designer Software. Go to File > Load from Core & Connect and then select the Core processor.
2. Go to Tools > Show Core Manager. Select Softphones. Click Softphone-1, and then click Edit.
3. Configure the parameters for the softphone. Of note:
   • Core Interface - Select the LAN interface to use for VoIP traffic. This interface must be able to reach CUCM.
   • Audio Codecs - Select only G.722 and either G.711 ulaw or G.711 alaw (largely depending on the system’s location). In North America, G.711 ulaw is prevalent; outside North America, G.711 alaw is more common. Contact your phone system admin if you are not sure.
   • Username - This usually matches the Directory Number in CUCM.
   • Transport - Use the setting that matches the Transport Type in the Phone Security Profile in CUCM.
   • Proxy - This is the IP address of the CUCM server. If you are using a cluster of CUCM servers with a publisher and multiple subscribers, the proxy IP should be one of the servers that allows registration.
   • Authentication ID - This is the same as the User ID on the End User screen in CUCM.
   • Password - This is the same as the Digest Credentials.
4. Repeat for each Softphone in the design.

Examples

In these examples, Q-SYS Softphone-1, 2, 3, and 4 correspond to CUCM Line 1, 2, 3, and 4.

1. To view the registered device list in CUCM, go to Device > Phone. The phones will be listed by device name.

2. After a Q-SYS Softphone is configured, the Cisco Third-party SIP Device (Advanced) may appear in CUCM with a status of "Partial Registered" as shown below. This is because some, not all, of the lines configured in CUCM for the device have successfully registered. This is not an issue.

   

3. Click on the Q-SYS Softphone’s Device Name. Its Phone Configuration page appears.

4. In the Device Information section, configure the Phone Button Template, Common Phone Profile, and Owner User ID. Repeat for each Device (Q-SYS Softphone).

   

5. In the Protocol Specific Information section:

   • Configure the Device Security Profile, SIP Profile, and Digest User.

   • Select Media Termination Point Required.

   • If there are problems making outbound PSTN calls after dialing 9, try selecting Require DTMF Reception.

   • Click Save.

   

6. Go to End User Configuration to configure the User ID, and set up and confirm the Digest Credentials.

   

7. Scroll all the way down to the bottom of the End User Configuration page and click Save.

8. Go to Phone Security Profile Configuration.

   • Set up the Transport Type.

   • Select Enable Digest Authentication.

   • Designate the SIP Phone Port.

   • Click Save.

   

1. Go to Q-SYS Designer Software and open Q-SYS Core Manager (Tools > Show Core Manager).
2. Click Network Settings.

3. If you are using only one LAN port, configure one gateway, as shown. Additional static routes are not needed.
4. If you are using more one LAN port, configure only one gateway but add Static Routes for the second LAN port.

SIP Response Code	Description
401	SIP/2.0 401 Unauthorized Typically caused by incorrect credentials from the calling user agent (Q-SYS Softphone), and/or misconfigured CUCM end user settings, and/or 3rd party SIP Phone settings.
404	SIP/2.0 404 Not Found Typically has the same causes as SIP code 401 (see above).
503	Registration Failed with status Service Unavailable [503] Typically caused by CUCM CallManager service not being enabled. Seen in clustered CUCM environments where only certain CUCM servers run the CallManager service. Remedy: Make sure the Q-SYS Softphone is configured with the correct CUCM server (i.e., one running CallManager service). Other common causes: Having the wrong IP address configured in Q-SYS softphone for the CUCM server. Network issues preventing communication with CUCM.