The VTech C4312 is a SIP cordless 1-line accessory handset charger designed for use with VTech SIP Contemporary Series cordless handsets, such as the CTM-C4402. It provides charging functionality via Power over Ethernet (PoE) and can be used in desktop configurations. It is part of the package for the CTM-S2415HC virtual bundle. Below are the key specifications, installation, operation, programming, and troubleshooting instructions.
Verify all parts are included: Charging stand with charging poles, CHARGE LED, and RJ45 jack. No handset or battery included; compatible with CTM-C4402 handset and Ni-MH AAA 600mAh 1.2V rechargeable battery. Requires Cat-5 network cable (not included; supplied separately for PoE connection). Install and charge handset battery before use. Ensure handsets are registered to compatible SIP base before placing into C4312 for charging. Keep handset in the telephone base or charging stand when not in use for optimal performance. Avoid placing near communication devices, heat sources, noise sources, dust, moisture, low temperatures, or mechanical vibrations.
WARNING! This product should be installed by a qualified technician. Save these instructions.
The C4312 is a SIP cordless 1-line charger designed for use with VTech SIP Contemporary Series cordless handsets. It includes CHARGE LED, charging poles, RJ45 jack for PoE, and a base for desktop use. Supports battery charging via PoE and automatic handset registration/deregistration. Unique hospitality features: Integration with speed dial keys (e.g., CONCIERGE, FRONT DESK) for quick service access via paired handset/base, message waiting LED (SIP messaging RFC 3261). Nominal effective range varies by environment; DECT 6.0 technology with 10 channels, transmit frequency 1881.792-1897.344 MHz, max EIRP 22dBm. Designed for guest room cordless mobility in SIP setups.
Applications: Hospitality SIP telephony; cordless 1-line charger for hotel desk setups.
CAUTION! To prevent electrical shock or equipment damage, unplug before installation. Use only supplied Cat-5 network cable.
WARNING! Follow safety precautions to reduce risk of fire, electric shock, or injury. Do not use near water; avoid rough handling. Do not open casing. Maintain 6-inch distance from medical devices. Wiring conforms to local codes. Avoid storms or gas leaks. Install by qualified technician only; connect only to host equipment. Use only specified battery (Ni-MH AAA 600mAh 1.2V); incorrect types risk explosion. Dispose batteries per local codes, not in fire. Keep metallic objects away from handset. Mount at less than 2 meters height. For SIP: Avoid interference from other devices; operate in 0°C - 50°C, 5%-95% humidity.
The charger comes ready for desktop use. Plug the Cat-5 network cable securely into the RJ45 jack on the C4312 and a network wall jack with Power over Ethernet (PoE). Bend a small paperclip and gently insert it into the Handset battery ON pinhole on the compatible CTM-C4402 handset to turn on the battery. Place the handset in the charging stand; the CHARGE LED illuminates during charging (full charge in 16 hours). For cordless integration, register the handset to a compatible SIP telephone base by placing it in the cradle—automatic registration occurs with MESSAGE WAITING LED flash and 3 beeps. Deregistration: On idle handset, press *331734# then HOLD and *883247# for confirmation tone. To register to another base, place on new base for automatic process. Desktop: Place on flat surface. Ensure installation height under 2 meters.
Place handset in C4312; CHARGE LED should turn on. For full system check with compatible SIP base: Ensure network cable is secure. Press /SPEAKER on handset for dial tone, then OFF to hang up. Verify registration by placement (LED flashes, 3 beeps). Test incoming call: Handset rings, message waiting LED flashes on base/handset. For cordless range, move handset within effective DECT 6.0 range and confirm no interference. If no dial tone, unplug/replug network for 15 seconds to synchronize (up to 1 minute). In hospitality, test speed dial keys (e.g., CONCIERGE) for programmed numbers.
Hospitality: Supports up to 4 handsets; speed dial for services.
Program via administrative web portal or Voice Menu on paired handset: Access Voice Menu by pressing TALK then Û Û Û Û. Options for network config, phone config (speed dial, call forward), factory reset (password 1234). Speed dial: Up to 4 keys, 32 digits each. Deregistration: Idle handset, press *331734# then HOLD and *883247#. No direct programming on C4312; relies on handset/base. For hospitality, program speed dials for services. Battery replacement: For paired handset, open cover, unplug old, install new Ni-MH AAA 600mAh 1.2V, secure. Changes effective upon confirmation or reboot.
Default settings indicated by asterisks (*). Adjustments via web portal or Voice Menu.
| Setting | Default | Options | Comments |
|---|---|---|---|
| Listening Volume | 6* | 1-8 | During call: VOLUME +/-; resets per call |
| Speakerphone Volume | 6* | 1-8 | During call: VOLUME +/- |
| Ringer Volume | 6* | 1-8 | Idle: Adjust via menu |
| Ringer Tone | Tone 1* | Tone 1-3 | Menu adjustment |
Admin Access: Web portal for SIP settings; Voice Menu for basic config.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| No charging/CHARGE LED off | Handset misaligned; dirty contacts. | Reposition handset; clean contacts with eraser/dry cloth; unplug/replug cable 15s; charge 30 min min. |
| Battery issues | Low/depleted battery. | Charge 16 hours; remove/reinstall battery; replace with Ni-MH AAA 600mAh 1.2V. |
| No dial tone | Power/line issue. | Unplug/replug network 15s; test with working phone; contact provider; check PoE. |
| Cannot dial out | Noise/no dial tone. | Ensure quiet; confirm dial tone; verify SIP server settings. |
| No ring | Out of range; low volume. | Move closer to base; adjust ringer VOLUME; check DECT interference. |
| Interference/fading | Distance; HSIA/modems. | Reduce distance; install DSL filter; relocate from appliances. |
| Abnormal beeps | Sync issue. | Reset: Unplug network/battery, wait, reinstall; resync up to 1 min. |
Care: Wipe with soft damp cloth; avoid liquids. Dispose battery properly. For service: +44 (0)1942 26 5195 or [email protected].