Operating Manual Part 15
Table Of Contents
- Safety Information
- General
- Controls And Display
- General Operation
- Radio Wide Features
- Conventional Features
- 5.1 Monitoring Before Transmitting
- 5.2 Monitor Mode
- 5.3 Busy Channel Lockout
- 5.4 Call Guard Squelch
- 5.5 Penalty Timer
- 5.6 Conversation Timer
- 5.7 Repeater Talk-Around
- 5.8 Displaying Transmit / Receive Frequency
- 5.9 Emergency Alarm and Call
- 5.10 Conventional Mode Scanning
- 5.11 Standard Conventional Calls
- 5.12 DTMF / ANI Signaling
- 5.13 Project 25 Mode Features
- 5.14 Keypad Programming
- 5.15 Text Messaging
- 5.16 Sending Global Positioning System (GPS) Data
- SMARTNET / SmartZone / P25 Trunked Features
- 6.1 Analog and Digital Operation
- 6.2 Viewing Unit ID
- 6.3 Standard Group Calls
- 6.4 Private (Unit-To-Unit) Calls
- 6.5 Telephone Calls
- 6.6 Call Alert
- 6.7 Messaging
- 6.8 Sending Status Conditions
- 6.9 Emergency Alarm and Call
- 6.10 Failsoft Operation
- 6.11 SMARTNET / SmartZone / P25 Trunked Scanning Features
- 6.12 Dynamic Regrouping
- 6.13 SmartZone and P25 Trunking Unique Features
- 6.13.1 Busy Override
- 6.13.2 Site Trunking
- 6.13.3 Determining Current Site and Searching for a New Site
- 6.13.4 Locking / Unlocking a Site
- 6.13.5 Auto Site Search
- 6.13.6 ZoneFail Site Lock
- 6.13.7 P25 Wide Area Scan
- 6.13.8 Normal P25 and SmartZone Control Channel Hunt
- 6.13.9 Talkgroup Steering through System Access Permissions
- 6.13.10 P25 Wide Area Scan
- 6.14 P25 Trunking Unique Features
- Miscellaneous
- Determining Available Options
- Password Description
- Secure Communication (Encryption)
- Service Information
10-6 5300 ES Series Mobile Radio Operating Manual October 2008
Secure Communication (Encryption)
If the channel has been strapped “Clear” and the option switch selects the “Secure” mode
on power up and a transmission is attempted, “CLEAR ONLY” is displayed and
transmitting is disabled. Likewise, if the channel is strapped “Secure” and the option
switch selects the “Clear” mode on power up and a transmission is attempted, “SECURE
ONLY” is displayed and the transmitter is disabled.
The radio can be programmed to ignore the “Clear” or “Secure” switch setting. These
preceding indications then do not occur and transmissions always occur in the strapped
mode.
Note If all channels/talk groups are strapped clear or secure and no C/S (Clear/Secure) option
switch is programmed, this parameter must always be selected (see following).
If the C/S (Clear/Secure) switch is not programmed, the radio is always in the last known
state (usually Clear) and there is no way to change it. For example, if the last known state
is Clear and this parameter is not selected, it is never possible to transmit a Secure message
on a channel strapped Secure because all that happens is transmitting is disabled, an error
tone sounds, and “SEC ONLY” is displayed.
10.3.2 Analog Receive Mode Options
The following receive options can be programmed with conventional operation. With
SMARTNET/SmartZone and P25 Trunked operation, encrypted calls are received if the
proper key is programmed.
Note The assignment of an encryption key assigns that key to the transmit side of a call only.
No Autodetect - Only signals coded like the transmit signals are received.
Secure Autodetect - Both clear and secure signals are automatically detected. This
mode is automatically selected if the transmit mode is switch selectable.
Proper Key Autodetect - (Analog Channels) When this feature is disabled and a
message is received with the wrong key, the audio unmutes and garbled (encrypted)
audio is heard. However, if this occurs with this feature enabled, the audio remains
muted.