- Fast Shipping
- Huge Inventory
- Trusted by Contractors
- 24/7 Ordering
The Simplex 2975-9053 is a red firefighter telephone backbox designed for Simplex remote emergency telephone equipment. It provides the enclosure required for mounting compatible firefighter telephone assemblies in fire alarm and emergency communication systems. Official Simplex/Johnson Controls documentation identifies it as a separately ordered backbox used with compatible 2084 Series firefighter telephone assemblies.
Simplex specifically describes the 2975-9053 as a red backbox available for pre-installation.
The 2975-9053 forms part of a firefighter emergency telephone system.
These systems provide dedicated two-way communications between remote firefighter telephone locations and a master firefighter telephone, typically located at the fire command center or fire alarm control equipment.
The 2975-9053 itself contains no telephone electronics. Its function is to house and support the compatible remote telephone assembly.
Official Simplex documentation lists the 2975-9053 under:
Remote Emergency Telephone Equipment – 2084 Series Firefighter Telephones.
Simplex documentation identifies it for use with various firefighter phone assemblies, including models associated with the:
families.
A current distributor also identifies the product as the “Box, Phone 4590-B-C-D.”
An important feature of the 2975-9053 is that the backbox can be pre-installed.
This allows the enclosure and associated conduit/wiring infrastructure to be installed during building construction before the finished firefighter telephone assembly is fitted.
Simplex’s 2022 documentation explicitly describes:
2975-9053 — Red Back Box available for pre-installation.
Official Simplex documentation specifies:
Height: 13 in / 330 mm
Width: approximately 9 9/16 in / 243 mm
Depth: 3 1/2 in / 89 mm
Color: Red
Product Type: Firefighter Phone Backbox.
An earlier Simplex document renders the width as 9 11/16 inches, while retaining the same metric dimension of 243 mm. The current 2022 documentation gives 9 9/16 inches, so 330 × 243 × 89 mm is the clearest manufacturer dimension to use.
The 2975-9053 is distinguished from another Simplex backbox:
2975-9053: Red backbox
2975-9313C: Red backbox without knockouts.
This distinction is important when specifying replacement or new-installation equipment.
For applicable Canadian 2084 Series configurations, Simplex lists compatible doors including:
2084-9103-C: Red surface door
2084-9104-C: Red flush door
2084-9105-C: Stainless-steel flush door.
The appropriate door is selected according to the desired mounting arrangement and project requirements.
Simplex documentation lists telephone assemblies such as:
2084-9106-C: Red phone assembly with armored cable
2084-9107-C: Red phone assembly with retractable cable.
The 2975-9053 is the backbox only. Telephone assemblies, doors, and other required components are selected separately.
The 2975-9053 is a mechanical enclosure, not an active electrical device.
Therefore, the backbox itself has no:
Electrical specifications are determined by the firefighter telephone equipment installed inside the backbox.
Although the 2975-9053 itself has no electrical operating requirements, the associated firefighter telephone system uses dedicated communication wiring.
Simplex firefighter telephone documentation describes typical operation using a dedicated two-wire circuit, commonly with twisted shielded pair wiring to reduce electrical noise.
Field wiring and conduit are routed into the backbox according to the specific telephone assembly and approved system design.
Typical installation includes:
Installation should follow the applicable Simplex instructions and approved fire alarm drawings.
Inspection should verify:
The backbox itself requires minimal maintenance beyond inspection for physical condition and secure mounting.
Suitable for:
The Simplex 2975-9053 Firefighter Phone Backbox provides the red enclosure required for compatible Simplex remote firefighter telephone assemblies. Its 13 × approximately 9.6 × 3.5-inch construction and pre-installation capability make it suitable for permanent firefighter communication stations in commercial and institutional fire alarm systems.
| Weight | 5 lbs |
|---|---|
| Dimensions | 14 × 14 × 14 in |
| Brand |
Your Payment information is processed securely. We do not store credit card details, nor have access to your credit card information.
Orders ship same day
Thousands of parts in stock
Reliable products & service
Order anytime, anywhere
The Simplex 2975-9053 is a red firefighter telephone backbox designed for Simplex remote emergency telephone equipment. It provides the enclosure required for mounting compatible firefighter telephone assemblies in fire alarm and emergency communication systems. Official Simplex/Johnson Controls documentation identifies it as a separately ordered backbox used with compatible 2084 Series firefighter telephone assemblies.
Simplex specifically describes the 2975-9053 as a red backbox available for pre-installation.
The 2975-9053 forms part of a firefighter emergency telephone system.
These systems provide dedicated two-way communications between remote firefighter telephone locations and a master firefighter telephone, typically located at the fire command center or fire alarm control equipment.
The 2975-9053 itself contains no telephone electronics. Its function is to house and support the compatible remote telephone assembly.
Official Simplex documentation lists the 2975-9053 under:
Remote Emergency Telephone Equipment – 2084 Series Firefighter Telephones.
Simplex documentation identifies it for use with various firefighter phone assemblies, including models associated with the:
families.
A current distributor also identifies the product as the “Box, Phone 4590-B-C-D.”
An important feature of the 2975-9053 is that the backbox can be pre-installed.
This allows the enclosure and associated conduit/wiring infrastructure to be installed during building construction before the finished firefighter telephone assembly is fitted.
Simplex’s 2022 documentation explicitly describes:
2975-9053 — Red Back Box available for pre-installation.
Official Simplex documentation specifies:
Height: 13 in / 330 mm
Width: approximately 9 9/16 in / 243 mm
Depth: 3 1/2 in / 89 mm
Color: Red
Product Type: Firefighter Phone Backbox.
An earlier Simplex document renders the width as 9 11/16 inches, while retaining the same metric dimension of 243 mm. The current 2022 documentation gives 9 9/16 inches, so 330 × 243 × 89 mm is the clearest manufacturer dimension to use.
The 2975-9053 is distinguished from another Simplex backbox:
2975-9053: Red backbox
2975-9313C: Red backbox without knockouts.
This distinction is important when specifying replacement or new-installation equipment.
For applicable Canadian 2084 Series configurations, Simplex lists compatible doors including:
2084-9103-C: Red surface door
2084-9104-C: Red flush door
2084-9105-C: Stainless-steel flush door.
The appropriate door is selected according to the desired mounting arrangement and project requirements.
Simplex documentation lists telephone assemblies such as:
2084-9106-C: Red phone assembly with armored cable
2084-9107-C: Red phone assembly with retractable cable.
The 2975-9053 is the backbox only. Telephone assemblies, doors, and other required components are selected separately.
The 2975-9053 is a mechanical enclosure, not an active electrical device.
Therefore, the backbox itself has no:
Electrical specifications are determined by the firefighter telephone equipment installed inside the backbox.
Although the 2975-9053 itself has no electrical operating requirements, the associated firefighter telephone system uses dedicated communication wiring.
Simplex firefighter telephone documentation describes typical operation using a dedicated two-wire circuit, commonly with twisted shielded pair wiring to reduce electrical noise.
Field wiring and conduit are routed into the backbox according to the specific telephone assembly and approved system design.
Typical installation includes:
Installation should follow the applicable Simplex instructions and approved fire alarm drawings.
Inspection should verify:
The backbox itself requires minimal maintenance beyond inspection for physical condition and secure mounting.
Suitable for:
The Simplex 2975-9053 Firefighter Phone Backbox provides the red enclosure required for compatible Simplex remote firefighter telephone assemblies. Its 13 × approximately 9.6 × 3.5-inch construction and pre-installation capability make it suitable for permanent firefighter communication stations in commercial and institutional fire alarm systems.
| Weight | 5 lbs |
|---|---|
| Dimensions | 14 × 14 × 14 in |
| Brand |
There are no reviews yet.
Your Payment information is processed securely. We do not store credit card details, nor have access to your credit card information.
Select at least 2 products
to compare
Reviews
There are no reviews yet.