Intercoms & Electric Surveillance Equipment

Feb. 15, 2003
Intercoms and electronic surveillance is a big market for locksmiths to get involved in.
Intercoms and electronic surveillance equipment are logical extensions of the services already expected from the locksmith. It's a big market, and could represent a substantial cash flow for some locksmiths who get involved in it. The locksmith outfits the door so that it provides the maximum amount of physical security with mechanical locks and door hardware. Intercoms and electronic surveillance equipment enable the client to identify visitors before unlocking the door or to determine that the area adjacent to the unprotected side of the door is safe. Intercoms and surveillance equipment are frequently referred to as entry systems. Entry systems can provide voice communication, CCTV observation, remote door control, door position monitoring, or all of these features. Besides doors, vehicle gates can also be fitted with such systems. Additionally, entry systems are used in multiple dwellings, gated communities, schools, residences, commercial buildings, sensitive areas within buildings and other areas. Electrically actuated door locks are used whenever controlled, remote, or scheduled locking/unlocking of an opening is required. Access controls are also members of this product group.These systems are considered essentials in urban environments and in the current heightened anti-terrorist atmosphere.TELEPHONE ENTRY
Telephone Entry Systems are a good product for the locksmith. One big advantage of these is that they do not require point-to-point wiring between the door unit and interior stations, as might be the case with a traditional hard-wired intercom system.
A telephone entry system will require power, and it is bound to be connected to an electrical door lock, and of course a telephone jack. The jack can be a phone number dedicated to the intercom, but more frequently, the intercom can be tied into the building engineer's phone, or lines associated with other facility monitoring systems. Depending on when and how frequently the entry system is used, a dedicated line may be required. Telephone entry systems are not considered Life Safety devices where their operation is critical. However, they are connected to doors and phone lines whose operation are indeed life safety issues, so it is best that a competent security specialist, such as a locksmith, be the person to recommend, supply, and install this type of hardware. Telephone entry systems are subject to regulations. The current and new safety standards for automated vehicular gates such as the installation we are highlighting (UL 325 and ASTM F2200) may require a separate pedestrian entrance for your installation. Our featured installation was for a residence. This project included alarm, intercom, locks, access controls, the gate operator, outdoor lighting and more. Therefore, several different trades were involved. When an opportunity presents itself to do a large-scale project, the locksmith should not be intimidated by assuming the burden of the entire installation. Although it may be an alien concept to locksmiths who are notorious loners, networking and partnering is a basic and essential aspect of business. The successful locksmith soon learns he can easily perform in a variety of roles in order to get the job done. On our project, because we didn't want to rent a ditch witch and there was a deadline to complete the project, the electrician did the wire trenching, buried the vehicle sensor and ran the line voltage; a gate operator contractor installed that unit. The carpenter constructed the gate (with some design requirements set forth by the gate operator contractor and locksmith). We did everything else, and lots of the detail work that invariably needs a master's touch. Be willing to learn, and be sure to select your tradesman referrals carefully, so you all can function as a team and there is no adversarial atmosphere on the job. First, it's about getting the 'talent' to work together; getting the hardware and components to work together comes next. DOOR KING MODEL 1812
The DOOR KING Model 1812 was chosen as much because of the reputation of the manufacturer as the features of the unit. DOOR KING has been around for a long time, and the 1812 reflects both the reliability and endurance of the DK as well as a feature set which enables the installer to meet the requirements of most installations. Although the 1812 is loaded with features and options, the system can be easily configured for basic applications.
The DKS Model 1812 is a unique telephone communication system which allows homeowners to use their telephone as an intercom to speak to a guest at a front door or gate, and to control access to their property. The unit can be programmed from the homeowners' PC with Door King's Windows®-compatible Auto-Programming software. The unit connects directly to the homeowners' existing telephone line; therefore there is no additional monthly expense for a second telephone line. The unit also can be programmed to work with both PBX and KSU phone systems. The built in call-waiting feature informs the homeowner that a visitor is present, without disrupting phone call that may be in progress, and assures that incoming calls or incoming visitors are not missed. The standard feature built-in clock/calendar provides time related functions such as: 1. Do-not-disturb time zone, which prevents pressing the visitor button during certain time periods from creating a nuisance within the residence.
2. Hold-open time zones where the gate or door may be left unlocked for a prolonged period of time, such as when guests are expected.
3. Entry code time zones, when certain entry codes will only work during certain times (good for routine services or deliveries).
4. Call forwarding time zone, when requests for entry at the 1812 are automatically forwarded to another phone number, allowing the homeowner to control access from other sites.
5. Flash entry code is a special use code, which will only allow entry for a single day. This can be programmed in advance.
6. Dial out numbers for situations where the gate controls entry to multiple premises. One example would be an "estate" which has a service quarters. The 1812 can be set so that if a guest wants to visit the service quarters and not the main house, he or she could press 1 instead of the call button. This would set the 1812 to dial a separate phone number and place the call directly to the service quarters.
7. With the double ring feature, the 1812 make a unique recognizable ring pattern so the homeowner knows it's someone requesting access.
Batteries to preserve system memory are built into the 1812. However, this source only keeps the time clock running and current in case of a power outage. It will not keep the 1812 operational. To keep the 1812 operational during a power outage, you do need to install "backup" batteries. Since the 1812 operates on 24-volts, two 12-volt .8 amp hour gel cells are recommended. The bigger the batteries, the longer the backup power is available.
The 1812 is equipped with two discrete output relays allows the control option to open only the entrance (vehicular gate or pedestrian gate) desired, to comply with some building codes. An optional auxiliary keypad can be added for entry code activation of door or gate from a second location. For example, in the installation we've highlighted in this issue, a buried vehicle detector and wireless remotes were provided for operating the gate for egress purposes. SECURITRON 62G MAGLOCK
Our application required a higher degree of security than the wooden gate and gate operator mechanism could provide. The Securitron Model 62G electromagnetic lock, which features a Female / Male Universal Conduit Fitting, was selected.
This pipefitting enables the wiring to the electromagnetic lock to be protected from elements as well as casual attack, and is an exclusive Securitron feature. This lock is useful for other applications where the wiring must be run along the surface (like on poured concrete door jambs). Securitron has a large assortment of installation accessories to accommodate any installation challenge, and offers a lifetime warranty. The gate position was monitored by the Sentrol Model 2500 wide gap heavy duty magnetic contacts, so that if the electromagnetic lock were compromised, or the gate forced, the alarm system and the occupant would be made aware of the situation. The Sentrol 2500 is designed for environments where a rugged sealed unit is required, such as our gate. It features a high strength extruded aluminum housing and is completely encapsulated in a special polyurethane potting compound. The 2500 is available in several models, with a variety of mounting accessories. The Securitron 62 series operates on only 3 watts (250 mA at 12 VDC or 125 mA at 24VDC). Its internal electronics eliminate problems often found in other maglocks because it reverses out residual magnetism and accelerates field collapse so that inductive kickback and EMI are suppressed. This reduces arcing over control switches or interference with nearby electronic devices. Ferrous metal aging, which could lead to stickiness over time, is blocked. The Model 62 G has a holding force of 1,200 pounds and is rated for operation from -40 to 140 Fahrenheit. It is suitable for outdoor use (NEMA 4X equivalent). All ferrous metal surfaces plated to MIL specs, and the magnet case is brushed stainless steel on standard models. This maglock was mounted so that it would resist opening from wind or attack. If the client desired real physical security, a metal gate and full perimeter fencing would be required. Actually, the gate has been replaced a number of times since the installation because the area in front of the gate is pitched slightly, and vehicles have a tendency to drift into the gate and crack it. The close up images of the maglock installation appearing with this article were taken prior to the application of RTV Sealant and finish coat of paint. Also, the magnetic contact used to monitor the gate position (which had to be located a respectable distance from the electromagnetic lock) and was concealed, and sealed against moisture and insects is not visible in the photo. For more information on Door King Systems, call 800-826-7493 or visit the website For more information on Securitron, call 1-800-MAGLOCK or visit the website For more information on Sentrol, call 503-692-4052 or visit the website