PTT-2 Push to Talk Lockout Device, 2 channel in and 1 channel out with priority keying lockout
Use to de-key radios on Busy/Idle T1 trunks
Industrial temperature rated -40 to +70 C
One control port unlocks multiple user ports when E&M is used to key radios
Supports Tie Line Types I, II IV and V
Units can be daisy changed, using a single control port
Industrial temperature rated -40 to +70 C
1U high, may be rack shelf mounted
Compact size
DIN rail clip option
AC and DC power supply options
Proudly manufactured in the United States of America
The PTT-2 is a Push-to-Talk lockout device. It is used with multiple E&M circuits linked to radios. The PTT-2 solves the problem of radio transmitters being locked into a Transmit ON state when a T1 circuit fails. Many T1 trunk lines will go into a busy condition when the T1 trunk fails. This causes the E&M leads to lock in an ON state, which causes radio transmitters to lock in the ON state.
The PTT-2 uses one control E&M circuit for 2 or more active E&M channels that are connected to radios, where the radios use the E&M to key the radio transmitters. The PTT-2 control E&M channel monitors its E&M leads. The control channel is not used for analog traffic, only for the purpose of E&M signal monitoring. If the control channel circuit goes into a mode where the E&M leads turn on, the PTT-2 assumes the T1 has failed. The PTT-2 then de-asserts the E&M leads of the operational channels 1 and 2.
The PTT-2 units can be daisy chained. This allows a single control port to serve 2, 4, 6, 8, etc. radio E&M audio channels.
SPECIFICATIONS
General
The PTT-2 uses one control port to serve 2 or more radio audio channels. The PTT-2 will de-key latched E&M leads in the event of a T1 line failure:
One RJ45 E&M control port
Two RJ45 E&M user ports
IN Dry contact connection on the back panel allows for remote activation of the lockout or allows units to be daisy chained together
OUT Dry contact connection on the back panel can be used for daisy chaining or to allow remote alarm triggering when a lockout is active
Selector switch on the back panel allows adjusting for E&M tie line types 1,2,4 & 5
LED Indicators on the front panel show power and if lockout is active
Test push button on the front panel allows the lockout to be triggered while the button is depressed.
Physical/Electrical
Stand alone, DIN rail, or 1U high rack mounting
Power requirements: 4 watts; 120 VAC, 12 VDC , -48 VDC, and 125 VDC options available.
4 1/4" x 5 1/2" x 1 3/4" H
one pound
Environmental
Operational Temperature: -40 to +70 C
Storage Temperature: -50 to +75 C
Humidity: < 95% Non-condensing
This is a limited volume production product. Please contact your sales representative or phone 800-432-2638 to determine lead time and pricing. Typical lead time is two to four months after receipt of order.
Data Comm for
Business Inc.
2949 County Road 1000 E
Dewey, Il 61840
