Platform service
Elwin Security repairs and replaces the Kantech Telephone Entry System (KTES) at Bay Area multifamily and commercial properties. The work covers the main board, door board, keypad, LCD and speaker inside the cabinet, the three relays and lock output that release the door or gate, and the telephone, Ethernet or RS-485 connection the panel communicates through.
Use case
Each situation below has a different fix, and the failed assembly, the telephone line and the connected controller decide which one applies.
Kantech's guide says the unit cannot function if its line is cut off, placed out of service or shared with other interconnect telephone devices. Kantech's 2019 datasheet lists the line type as standard touch-tone or rotary, with up to 5 units on the same line. When a property is dropping its analog line, the decision is whether the panel keeps a line or the panel gets replaced.
Kantech's installation guide lists spare assemblies for the KTES: the KTES-MPCA main PCB, the KTES-DCPA door PCB with keypad and microphone, the KTES-LCD LCD module, the KTES-SPEAK speaker, the KTES-LENS clear lens, the KTES-LOCK cabinet keylock and the KT-TAMPER tamper switch. The same guide states there are no serviceable parts within the equipment and directs the owner to the installer. Elwin's repair at the panel is a swap of one of those assemblies.
When a KTES is connected to a controller through its Wiegand interface, Kantech's guide states the controller manages the attached lock. Its KT-400 notification sets end of manufacture at December 31, 2024, end of sale at March 31, 2025 and end of support in December 2029, with the KT-4 as the replacement.
Service focus
The first job is to read the panel's serial number, firmware version and tenant capacity from its System Info menu.
Kantech lists the main PCB, the door PCB with keypad and microphone, the LCD module, the speaker, the lens, the cabinet keylock and the tamper switch as spare parts for the KTES. Elwin repairs with the assembly or firmware update that matches the failure.
The guide calls for a backup-battery test twice a year and an annual lithium-battery voltage check, and says to contact the distributor to return the KTES for maintenance if the lithium battery measures below 2.5 VDC, because that battery cannot be replaced in the field. Programming is done at the keypad or from EntraPass over a modem, Ethernet or RS-485.
Kantech's datasheet gives each tenant two telephone numbers of up to 24 digits, a 1-5 digit directory code and a 4-6 digit PIN. When the property wants video calling, a mobile app, or a directory the panel cannot hold, Elwin replaces the KTES and reuses the door or gate release wiring where it tests sound.
Service check
The System Info menu, the connection type and the controller behind the panel decide which Kantech parts and paths will work.
Kantech's programming manual lists the System Info menu as the place to read the serial number, MAC address, firmware version, number of tenants and maximum number of tenants. Factory default maximum is 250 tenants.
Telephone line at the TIP and RING terminals, Ethernet to an EntraPass Gateway, or RS-485 on COM1, and whether EntraPass, a dial-up modem or the keypad programs the panel. Kantech's programming manual says the telephone line is monitored for busy or disconnected conditions when Line Monitoring is on, its default.
Whether the KTES runs stand-alone or in pass-through mode to a Wiegand controller, which relay or the lock output drives which door or gate, and whether the controller is a KT-300 or KT-400 covered by a Kantech lifecycle notice.
The KTES reports AC Lost, Normal Battery, Low Battery or No Battery to EntraPass.
Scope details
The boards, the connection, the controller and release hardware, and the programming are what a repair touches.
Kantech's guide lists three Form C relays rated 30 VDC or 24 VAC, 3 A max each, and four monitored points. The guide's safety instructions say to disconnect power before servicing, so board and display work is done with the panel powered down.
The dial-up modem runs at up to 2,400 baud and, per the datasheet, requires a DU-MODEM-HOS at the host computer.
Kantech's guide says in pass-through mode the KTES cannot unlock doors or activate relays on access events, and the access controller manages the door. The guide also states that if the KTES lock output is used in fail-secure mode, a listed panic hardware device shall be used to allow emergency exit. Your fire marshal or local AHJ determines what egress hardware is acceptable.
The E-KTES-CD1 software included with the panel is EntraPass Special Edition with only KTES-enabled features.
Process
The process keeps repair decisions tied to Kantech's published parts list, connection rules and lifecycle notices.
Record the serial number, firmware version, tenant count and capacity from the System Info menu, the connection type, the controller and relay wiring, and test calls, keypad, LCD, lock output and each relay at the panel.
Result: The quote names the exact Kantech assembly, connection fix, controller change or replacement, not a generic intercom repair.
Match the failure to Kantech's spare-parts list, its line and power requirements, and the lifecycle status of the connected controller: a replacement assembly, a line or power fix, a firmware update from EntraPass, a controller change, or a new system.
Result: The property knows what the fix costs and what it leaves in place.
Install the part or system, load or restore the tenant list, test each relay, the lock output and the call path, change the installer PIN, and show the property team how tenant programming works.
Result: The entry works and the property can manage its own directory.
Field proof
Photos of building entry hardware. Kantech's published documents cover the KTES parts list, specifications and a KT-400 lifecycle notice.
Kantech's guide states there are no serviceable parts within the equipment and directs the owner to the installer. The same guide lists spare assemblies: main PCB, door PCB with keypad and microphone, LCD module, speaker, lens, cabinet keylock and tamper switch.
Kantech's warranty terms in that guide cover the product for 2 years from the date of purchase, require an authorization number before any return, and state that out-of-warranty units Kantech determines to be repairable are repaired for a set fee, while units it determines not to be repairable are replaced by the nearest equivalent product available at that time.
A video intercom panel at a gated entry, beside a keypad lever lock on the gate. This is the kind of entry Elwin plans when a KTES is replaced with a video intercom.
The release side of an entry: a door contact at the top of the frame, a closer, and a flexible cable loop at the door edge.
Johnson Controls' KT-400 notice lists end of manufacture December 31st, 2024 and end of sale March 31st 2025.
Service request
Tell Elwin what is not working, what systems are already on site, and which access points matter most. The next step is a scope grounded in the building, not a generic product list.
