DTC Communications Inc. T2500 用户手册

This manual describes the operation of the Digital Derringer™ T-2500-M. This 

transmitter operates in the following modes: 
• Analog Narrow Clear                
• Analog Narrow Scrambled       
• Analog Wide Clear                    
• Analog Wide Scrambled          
• Digital Clear
• Digital Encrypted
The T-2500-M is a synthesized VHF, digital and analog audio transmitter with 

a power output of up to 500 mW. The T-2500-M has built-in recording and 

memory for up to eight hours of record time. 
The T-2500-M has 10 programmable channels. It is designed for personal 

protection and evidence gathering missions. Its miniature size and rugged 

design ensures safe concealment and long lasting performance. Battery life is 

from 2.5 to 10 hours operation depending on the external battery pack used. 

The transmitter is programmable for digital P25 clear, digital P25 encrypted, 

analog narrowband, or analog wideband operation. Scrambling is available for 

analog modes. DES/AES encryption is available for digital modes.
The T-2500-M transmitter has its own internal Tibbets microphone or use the 

external Tibbets mic.
Concerned with the rapid evolution of digital communication technologies and 

a need for interoperability, the Association of Public Communications safety 

Officials (APCO) developed an open architecture, digital standard for public 

safety and government communications systems. Products compliant with 

APCO Project 25 standard are interoperable, regardless of the manufacturer. 

The National Telecommunications and Information Administration (NTIA) has 

adopted the APCO Project 25 interoperability standard, also known as TIA/EIA-
102. The T-2500-M is compliant with this standard.

Front View

Channel 
Select
Switch
(use 
screwdriver)

Back View

Status 
LED

ON/OFF 
Push-button
(use 
paperclip)

Alignment Mark for Large Pin of 
5-pin Locking Connector