CyberData - Singlewire-enabled VoIP Ceiling Speaker

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1. Are there a set of specs. or standards that define proper spacing for your ceiling speakers? We need to determine the proper number of speakers for our buildings’ corridors. I am looking for something that considers ceiling height and room size/shape to suggest the appropriate quantity. The speaker calculator on your website seems sufficient for square rooms. It is hallways that I am struggling with. The hallways measure 9 feet x 9 feet by 100-150 feet in length.
2. I am unable to connect with the unit when it is plugged into a Cisco SLM 224P switch.
3. I have a Cisco 6513 switch. When I plug in a CyberData VoIP device, the device constantly reboots and will not register to the SIP server.
4. I have a Cisco Catalyst series switch. How do I set the unit so that it can use PoE (under 15.4w) instead of an external power source?

The speaker calculator on your website seems sufficient for square rooms. It is hallways that I am struggling with. The hallways measure 9 feet x 9 feet by 100-150 feet in length.

In a ceiling mount, you would want about 1 per every 10-15 feet of hallway length.
If you used the paging amp you could use 3 paging amps per 100 feet as per this drawing.
This assumes average ambient noise and surface attenuation levels.
The following figure shows the 011061 V2 Paging Amp and the 011068 Horn Loudspeaker:

2. I am unable to connect with the unit when it is plugged into a Cisco SLM 224P switch.

The cables or switch ports that you are connecting to are set in switch or hub mode instead of endpoint stations. The MDIX setting needs to be changed to MDI since our VoIP products are end stations.
From the Cisco SLM 224P User Guide:
Change to MDI:
MDI / MDIX Displays the Media Dependent Interface (MDI) / Media
Dependent Interface with Crossover (MDIX) status on the port. Hubs and
switches are deliberately wired the opposite of the way end stations are
wired, so that when a hub or switch is connected to an end station, a
straight through Ethernet cable can be used, and the pairs are matched up
properly. When two hubs or switches are connected to each other, or two
end stations are connected to each other, a crossover cable is used to
ensure that the correct pairs are connected. The possible field values are:
- MDIX Use for hubs and switches.
- MDI Use for end stations.

3. I have a Cisco 6513 switch. When I plug in a CyberData VoIP device, the device constantly reboots and will not register to the SIP server.

Please adjust the switch power selection to Power inline static, as opposed to Power inline dynamic. This will allow the device to continuously receive 15.4W of power.

4. I have a Cisco Catalyst series switch. How do I set the unit so that it can use PoE (under 15.4w) instead of an external power source?

There are known PoE limitations with third party devices on the Cisco Catalyst series switches. This includes the 2500, 3500, and 6500 series switches.
Its important to keep in mind that CyberData devices are considered third party devices and require switch port setting adjustments.
Be sure to turn power policing off if it has been enabled on your switch. Power policing is disabled by default. Also, configure your port for no shutdown.
Use the following command to configure inline power:
power inline static max 15400