Cisco Callmanager Webphone

CUCM Phone on the Browser with No VPN Required

On-Premises or Hosted for Cisco CUCM users with no client installation or specialist firewall required.

Compare Webphone with Microsoft Teams and Cisco Jabber

Cisco UCCX Wallboard

Eliminate Cisco Jabber or Software Installation on User PCs.

Secure, VPN-Less Webphone for Cisco CUCM.

Cisco CUCM Support in VDI Scenarios

Click here to download Cisco CUCM WebRTC Phone data sheet.

  • Login using existing Active Directory or Single Sign-On account.

  • Call Forwarding, Voicemail and DND buttons.

  • List of recent calls made and received. Ability to call back or copy the phone number and add to favourites.

  • Call logs for the last seven days


    Copy, callback and favourite the numbers

  • Access to Cisco CUCM Corporate Directory

  • Handle incoming calls


    Wide range of CODECs supported, including G.711 and G722

  • Call control features


    Query the Caller in CRM button

  • Transfer or conference the call to another number, Cisco CUCM Corporate Directory contact or a contact in Favorites

  • Switch between the initial call and the consult call.


    Customer Chats: Web and mobile

    Accepting and managing Callbacks

    Managing incoming customer emails, along with an automated ticketing system

  • Comstice Omnichannel features


    Customer Chats: Web and mobile

    Accepting and managing Callbacks

    Managing incoming customer emails, along with an automated ticketing system

Why Cisco CUCM Webphone by Comstice

Secure, VPN-Less Webphone for Cisco CUCM

No VPN, no installation required. Enterprise telephony features on the web browser and mobile app.Learn more.

Cisco Finesse Webphone Gadget

Cisco UCCX and UCCE Contact Center agents can also use Comstice Webphone as a gadget.

Webphone for Webex Calling

Webphone can be integrated with Cisco Webex Calling service.

On-Premises or Comstice-Hosted Solution

Webphone offers maximum privacy by running on your company's network or privately hosted by Comstice.Click here to learn more.

Comstice Webphone Mobile App

Make and receive VoIP and mobile calls through Cisco CUCM, protect mobile phone number and record mobile business calls..

Webphone inside CRM Pages

Comstice Webphone can work with any web browser and users can make and receive calls from CRM contacts or other web apps.

PSTN Fallback While on the Move

In case of poor audio quality due to Internet connection, you can use your mobile phone line at the last leg of the call for both inbound and outbound.

Secure, Encrypted Telephony

Comstice Webphone offers different layers of encryption and security features for the remote users.

Compare Comstice Webphone with Cisco Jabber and Microsoft Teams

Features Cisco Jabber Microsoft
Comstice Webphone
Registered to Cisco CUCM? Yes No Yes
Browser-Based? No Yes Yes
Can be integrated inside CRM webpages? No No Yes
Offers API library to implement inside Web applications? No Yes Yes
Works without Complex Security/Firewall Setup? No Yes Yes
Can be used by Cisco UCCX and UCCE/PCCE Contact Center Agents? Yes No Yes Learn more
Cisco CUCM Enterprise Telephony Features (Call Park, Pickup, Hunt Group Member etc.) Yes No Yes
SMS notifications for the incoming and missed calls No No Yes
Name-only inbound and outbound external calls for protecting customer numbers No No Yes
Reliable Mobile Softphone App with cell network fallback? Yes No Yes
MS Teams Chat/IM Access No Yes Yes
On-Premises Solution? Yes No Yes
Cisco UCCE Multi-tenancy

Chromebook Support for Cisco Enterprise Telephony Users

Sales reps, partners and temporary staff can use Chromebook PCs with no installation required and communicate with the clients through webphone.

Chromebook PCs are the low-cost, low-maintenance alternatives to other PCs. No data can be saved on the Chromebook and user has very limited permissions to install apps.

Comstice Webphone helps to handle audio conversations using browser. It can work without the VPN, through the public Internet.


CODECs Supported by the Web Browsers and Cisco CUCM

CODEC Name Browser Compatibility
OPUS Chrome, Edge, Firefox, Safari
G.711 A-Law Chrome, Firefox, Safari
G.711 U-Law Chrome, Firefox, Safari
G.722 Chrome, Firefox, Safari
iLBC Chrome, Safari
iSAC Chrome, Safari
VP8 (video) Chrome, Edge, Firefox, Safari (12.1+)
H.264 (video) Chrome (52+), Edge, Firefox, Safari
VP9 (video) Chrome (48+), Firefox

Technical Architecture

You can run Comstice CuCM Webphone solution on your network or in your cloud.

Internal Agents

Eliminate client software installations on user PCs

Users can handle inbound and outbound calls using a web browser and can use telephony features imside the CRM pages, Intranet or other web apps.

Comstice Webphone offers Cisco CUCM enterprise telephony features with no software installation on user PCs.

Remote Agents

Users with tandard PC or ChromeBook can access Comstice Webphone with no VPN required.

Comstice CUCM Webphone is based on WebRTC technology. Using NAT on the external firewall and Web Proxy features, you can have a secure audio communications in the web browser. WebRTC uses HTTPS for signaling and Secure RTP for the audio streams.

Frequently Asked Questions

How does it work?

Comstice Webphone registers to Cisco Callmanager as a third-party SIP phone. Comstice WebRTC Gateway registers each WebRTc session on the web browser as a SIP Phone on Cisco CUCM.

What versions of Cisco Callmanager are supported?

Cisco CUCM Third-party SIP Phone support starts from v8.5. Any Cisco Callmanager with version 8.5 or higher is supported.

How does the rollout work?

Comstice WebRTC Server is provided as virtual server and hosted close to Cisco CUCM servers. Depending on the usage scenarios certain firewalls need to be opened as well.

What are the supported browsers?

Comstice Webphone uses WebRTC technology which is supported by Firefox, Chrome and recent Microsoft Edge browsers. Any modern browser supports WebRTC standard.

How is Comstice Webphone licensed?

It is subscription-based. Subscription is per named user or concurrent.

Which CODECs will be used?

Mainly G711 or G722 are used. CODECs will be negotiated during call establishment and depending on the Cisco CUCM configuration, OPUS, G711 or G722 can be used. Web browsers support a wide range of CODECs.

Does the solution support High Availability?

Comstice Webphone supports high availability. Multiple servers can be deployed and work as active/active in 1:1 redundancy.

How does audio recording work?

Audio recording will be done using media forking on the Cisco CUBE level. Otherwise, Comstice WebRTC Gateway can record the calls as well.

Do we need Cisco Jabber or Cisco ExpressWay?

No. There is no dependency for Cisco Jabber or Expressway.