The UCM PBX's Call Center Features And How To Use Them

The UCM PBX's Call Center Features And How To Use Them

For small to medium businesses, customization is fundamental when building a telecommunication solution. An on-premise VoIP solution is a popular IT system as it allows businesses to create a expandable solution to fit their needs. One of the dominant functionalities that a VoIP system delivers is call centre features that allow for organizations to implement their own localized call centre to better serve their client base.

Grandstream Networks’ UCM series of IP PBXs have built-in call center features which enable businesses to run their call centers efficiently and efficaciously.

Call Queues

Call queues are part of the central foundation of every call center system. Normally, a call queue consists of callers, agents, a strategy, and hold music. The incoming calls or “callers” are placed into the queue where the answering “agents” are assigned to answer the calls. The call queue strategy in place coordinates how the PBX will distribute the incoming calls to the agents. As callers are waiting in the queue, hold music or advertisements are aired, filling the void. There are 6 different strategy types for the call queue that organizations can choose from:

  • Ring All: All available agents will be called concurrently until one answers
  • Linear: Agents will be called in a particular order
  • Least Recent: The agent who has been called the least recently will receive the call
  • Fewest Calls: The agent with the fewest completed calls will receive the call
  • Random: An agent will be called randomly
  • Round Robin: Agents will be called in Round Robin scheduling

The UCM series also supports a Virtual Call Queue which will also permit customers to receive a call-back instead of waiting on hold. Following a period of time within which the customer is kept waiting, they will be advised to choose between remaining in the call queue or leaving a call back number without losing their position in the queue. The call-back number is then automatically dialled by the UCM when the customer’s place in the queue has been reached. This feature reduces long wait times on hold during peak hours, improving the overall customer experience. Additionally, the UCM supports call queue position announcement, which allows the caller to determine where they stand in the queue.


The Grandstream UCM supports monitoring features that allow management or coordinators to aid agents throughout the call process. With call barging, managers are able to use feature codes to perform the functions below:


  • Listen: In listen mode, the extension monitoring the call can hear both parties in the active call, but will remain muted
  • Whisper: In whisper mode, the extension monitoring the call can hear both parties in the active call, but can only be heard by the agent on the call
  • Barge: In barge mode, the extension monitoring the call can listen and speak to all parties on the active call, similar to 3-way audio conferencing

These features enable hands-on training for agents while still allowing for oversight by supervisors to better gauge the agents’ actions while on the call. The UCM also has built-in call queue statistics for performance measurement and agent evaluation. This data can also be broken down for each queue separately or the system altogether. Managers and supervisors can use this information to improve daily operations at the call center either for one queue or the system as a whole. The data includes information on call distribution, login/logout records, start and end times, and virtual queue information. Managers have the option to manually download these statistics or program an automatic download at a specified frequency.

Computer Telephony Integration (CTI)

Computer Telephony Integration refers to any technology or solution that allows the integration between telephone and computer networks. This functionality is an fundamental foundation for any call center solution allowing agents more flexibility when handling a high volume of calls. Agents are able to perform most call control functions on their desktop in just a few clicks. Grandstream’s solutions are designed to ease the workload of agents with the GS Affinity application and a web-based switchboard. The UCMs have a simple and easy way to use the switchboard for real-time monitoring of call queues and performing different operations which include:

  • List of waiting calls
  • List of proceeding calls
  • Ability to manipulate proceeding calls
  • List the Agent’s status

Users can access the call queue switchboard through the user portal and the queue chairman. Agents can log into the web GUI portal using their extension number and their user password. The user portal allows access to a variety of features including user information, extension configuration, settings, and more. Each agent can log into their user portal account and access the call queue switchboard where they will be able to control their calls and status. Another way to access this switchboard is through the queue chairman, providing a CTI interface for the supervisors. The queue chairman has more advanced features and control over the call queue than the normal agent user portal access.


Customer Relationship Management (CRM) is supported through the UCM allowing users to search for contact information collected in the contact record. The UCM can be integrated with popular CRM tools such as SugarCRM, ZOHO CRM, and Salesforce. When integrated with the GS Affinity app, agents are able to retrieve contact information while on a call in order to provide their clients a more personalized experience.

IVR and Call Recordings

Grandstream’s UCM supports a full built-in IVR (Interactive Voice Response) module. Users can create up to a 5-level IVR system to customize their callers’ experience with the ability to select from pre-set options. All of the IVR settings can be managed under the Call Features menu on the user interface. Here, users can record custom prompts, enable key-pressing events to guide callers through, select language, and even set up blacklist & whitelist filters. By using the IVR, companies can guide inbound phone traffic to help customers reach the required department or individual without interaction with a live agent.
As with any call center system, call recording is an integral part of the caller’s journey through the call queue. The UCM supports call recording either automatically or through the feature codes for active calls. This allows the administrator to keep a record of all calls under the call queue system for monitoring, statistics, and also to use as learning tools. Once the auto-record feature is enabled, the system will record all calls under the assigned queue in .wav files to be accessed, downloaded, and assessed.

Grandstream’s UCM IP PBX’s call center features provide businesses with a powerful and customizable solution to handle a high volume of inbound calls in a simple manner. From call queues to interactive voice response, businesses can adjust the UCM’s settings so that calls are more effectively handled by agents and the customers’ issues are resolved quicker, providing a better overall experience for both the customer and the agent.


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