1. In the NocTel Portal click Account Preferences >> Paging Groups in the main left-hand menu.
2. From the list of paging groups click the group you are using that is having issues. 
3. Adjust the Maximum Paging Length to a higher amount.
   
   
   
4. Click Submit to save the change.

Check to ensure that no Algo speaker has a duplicate IP address. If two devices are competing for a single IP address it can cause the multicast page to stop. 

For multicast paging to work all the devices (Polycom phones and Algo speakers) must be on the same VLAN. 

• Ensure that Poly/Polycom desk phones in the paging group are on the same VLAN. You can press and hold 1-4-7 on a Poly phone to bring up its details including VLAN information. 
• Ensure that all Algo speakers in the paging group are on the same VLAN. You may need to make adjustments to the VLAN setting in the Algo interface. VLAN settings are located under Advance Settings >> Network.

If the devices in your paging group are on different switches in your network, you may need to look at IGMP snooping setting.