Hi all,
I’m dealing with a strange issue on a Hikvision deployment and would appreciate input from anyone who has worked with DS-K1T342 terminals in intercom mode.
System Setup
- Door station: Hikvision DS-K1T342MFWX-E1
- Indoor unit: Hikvision DS-KH9510-WTE(B)
Network:
- Dedicated LAN (isolated from corporate network)
- No router / no internet access
- All devices on static IP addresses
- Connected via D-Link unmanaged 16-port switch (non-PoE)
- Devices powered independently (no PoE involved)
Topology:
- Multiple DS-K1T342 units on same LAN (other doors)
- Only one indoor unit (KH9510) in this setup
Configuration
KH9510:
- Community: 1
- Building: 1
- Unit: 1
- Room: 1
- Main Door Station IP configured
DS-K1T342:
- Intercom mode: Press Button to Call
- Call type: Indoor Station
- Room number set to: 1
Observed Behavior
Initially (after setup / reboot):
- Door → Indoor call works ✔
- Indoor → Door call works ✔
After ~15–20 minutes:
- Door → Indoor call fails
- Displays: “Call Failed”
- Indoor → Door still works ✔
- Door unlock from indoor works ✔
Important Notes
- Network has been tested — stable, no drops
- Configuration is confirmed correct (worked initially)
- No DHCP involved (all static IPs)
- No router, no NAT, no external dependencies
- This is a pure LAN deployment
Additional Observation
- Attempted to configure registration password on KH9510, but it did not persist/save
(not sure if relevant, but noting it)
Key Question
Has anyone seen a case where DS-K1T342 can call an indoor station initially, but loses that ability after runtime, while the indoor station can still call the door?
What I’m Trying to Determine
- Is this:
- a known limitation of K1T342 intercom functionality?
- a firmware-related issue?
- or something specific to using it without a router / server / SIP environment?