what is telephone cylinder

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The TEL option is only available on the 4010, 4020, and the 4110 series closers. The 4041/4040XP is not available with TEL (telephone closer). 
You can contact Allegion Customer Service (Sales Support) or Technical Support (Product Support) by phone or by email. To contact by phone: call 877.67...
NOTE: You can also reach your local sales office by dialing 877-671-7011 and selecting option #3 from the main menu. You will be directed to your sales office based on the area code ...
Telephone Cylinder
Dynamic Channel Switching is a feature of the Schlage AD-series wireless access point modules. Dynamic Channel Switching (DCS) increases the robustness of the wireless RF communication in a noisy r...
  Here is a Technical Note on what Dynamic Channel Switching is, what it improves, how to set-up, and frequently asked DCS questions. DCS Tech Note here  
Setting Dynamic Channel Switching   1)     Connect and couple the SUS to the PIM400 you intend to change. See the SUS User Guide for details   2)     Under “PIM Properties” and the “Edit” tab is ...
Only the Schlage ND-Series can be prepped to accept non-Schlage cores. All designs are supplied with the appropriate tailpiece Non-Schlage cores are NOT included Lever designs available vary d...
 A 1 1/4" cylinder with straight cam is required for the Von Duprin SD (Special Dogging) exit device option.
The cylinder cam must be inverted with the SD option to work properly.