Software Features
Operating Mode
P25 Phase 1 & Phase 2 Trunking
Trunking systems use advanced algorithms to efficiently allocate available channels among a large number of users. Unlike conventional radio systems where fixed channels are assigned to users, trunking systems dynamically allocate channels based on call requests, optimizing channel usage and reducing waiting time by channel congestion.
P25 Phase 1 trunking uses the FDMA (Frequency Division Multiple Access) method in one 12.5 kHz physical channel.
P25 Phase 2 trunking uses the TDMA (Time Division Multiple Access) method, to create two logical channels in one 12.5 kHz physical channel.
The P25 radio complies with DHS P25 CAP (TIA-102) Certification for multiple vendor interoperability.
| Features | License Key | Handheld | Mobile |
|---|---|---|---|
| P25 Phase 1 Trunking | ISL-P25TR | ✓ | ✓ |
| P25 Phase 2 Trunking | ISL-P25P2 and ISL-P25TR | ✓ | ✓ |
FM Wideband (25 kHz) Programmable
FM wideband mode (25 kHz) channel spacing is programmable, if necessary.
| Features | License Key | Handheld | Mobile |
|---|---|---|---|
| Analog Wideband (25 kHz) | ISL-P25W | ✓ | ✓ |
Other Features
- CTCSS and DTCS tone squelch supported
- 2-Tone paging (encode and decode) supported
- MDC1200 signaling supported
- Digital/Analog mixed mode operation
Security
AES, DES and ARC4 Encryption
Depending on the required security grade, there are three encryption methods to choose from.
Multiple AES/DES keys (up to 64) and 32 Common Key Reference (CKR) can be loaded into a radio.
When using ARC4 encryption, 8 software encryption keys are available.
| Encryptions | Security Level | Required Unit | License Key | Handheld | Mobile |
|---|---|---|---|---|---|
| AES Encryption (256-bit) | Most Secure | UT-134 or UT-125FIPS | ISL-P25AES | ✓ | ✓ |
| DES Encryption (56-bit) | Practically Secure | UT-134 or UT-125FIPS | - | ✓ | ✓ |
| ARC4 Encryption (40-bit) | Simple implementation | UT-134 or UT-125FIPS | ISL-P25AES/ARC4 | ✓ | ✓ |
FIPS 140-3 level 1
The UT-125FIPS will meet FIPS 140-3 level 1 security requirements for US federal agencies which uses cryptography.
- Pending FIPS140-3 approval.
| Features | Required Unit | License Key | Handheld | Mobile |
|---|---|---|---|---|
| FIPS140-3 Level1 AES | UT-125FIPS | ISL-P25AES | ✓ | ✓ |
LLA (P25 Radio Authentication)
The LLA function (also known as P25 Radio Authentication) provides an authentication procedure to establish links between radio units and the system for Phase 1 and Phase 2 Trunking systems. Both Unit Authentication (infrastructure initiated) and Mutual Authentication (unit and infrastructure authenticate each other) methods supported.
| Features | Required Unit | Keyloader Cable | Handheld | Mobile |
|---|---|---|---|---|
| LLA (Link Layer Authentication) |
UT-134 | Handheld: OPC-1871 +OPC-2525 +OPC-2480 +BC-258A/V Mobile: OPC-2526 +OPC-2525 +OPC-2480 +BC-258A/V |
✓ | ✓ |
OTAR (Over-the-Air Rekeying)
The OTAR function can send encryption key updates to radios over the air. The OTAR is supported for both conventional and trunking mode. P25 radio users do not have to bring back their radios for manual service. The OTAR function simplifies encryption key management and enhances system security.
Other Features
ASK (Advanced System Key) protection
- Hardware-based ASK (Advanced System Key) protects the radio from unauthorized programming. (for Trunked System)
- Analog inversion voice scrambler (16-codes)
Operational Enhancement
OTAP (Over-The-Air-Programming)
The OTAP function can conveniently read and write the radio programming over the air using a P25 channel. It can remotely update the configuration on the P25 radio, minimizing the need to bring back the radios for wired updates.
| Features | Software | License Key | Handheld | Mobile |
|---|---|---|---|---|
| OTAP (conventional mode) | CS-OTPM2 | ISL-P25DS | ✓ | ✓ |
Conventional Voting Scan
When used in a multi-site repeater system, the P25 radio scans repeater channels and automatically selects to the strongest repeater site. Stay connected for longer over wider areas.
| Features | License Key | Handheld | Mobile |
|---|---|---|---|
| Voting Scan | ISL-P25VS | ✓ | ✓ |
Front Panel Programming
The front panel programming function enables a user to program memory channels and zones in the field and temporarily regroup memory channels using the front panel controls.
| Features | License Key | Handheld | Mobile |
|---|---|---|---|
| Front panel programming | ISL-P25FP | ✓ | ✓ |
Location Data Transmission
When the GPS feature is used, the P25 radio can automatically transmit location data at programmed intervals. The location data can be sent with voice call or status call to be used with a location system. The GPS log functions logs user position data in a microSD card memory.
| Features | Required Unit | License Key | Handheld | Mobile |
|---|---|---|---|---|
| GPS and Transparent Data | UX-241 (GPS Antenna for mobile radios) |
ISL-P25DS | ✓ | ✓ |
Transparent Data Modem
The P25 radio can be used as a transparent data modem which transmits the serial data received from a PC or various devices*. The P25 radio can interface with other devices through Bluetooth® connection for easy data entry.
Third-party products required.
| Features | License Key | Handheld | Mobile |
|---|---|---|---|
| GPS and Transparent Data | ISL-P25DS | ✓ | ✓ |
