My guess would be,.
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I found this on Craigslist but have not purchased.
Eliminate the cost and vmware esxi 5.0 patches hassle of locating phone lines for your demos.Press enter to search.Please read and decide where it belongs, move if desired, and delete this paragraph.Ideal for use at industry expos, test labs or production environments.Looking for other manuals?Programmable line parameters, caller ID, Visual Message Waiting, realistic, simulated CO/PBX lines in a compact, fully-featured unit.Moderators: I wasn't sure whether it would be appropriate for me to post this to Classifieds, this subforum, or somewhere else.Many functions of the TLS-3 are easily programmed with a touchtone phone.Electrical, input Voltage: 24 VDC nominal, 500 mA minimum.Signal duration: 850 ms.Reorder: Hz 250 ms on/250 ms off.Maybe using a pocket "tone dialer" would be needed for any rotary-only connections).Popular Products, top TelTone Computers Internet Experts.On-Hook Voltage: -42 VDC nominal, inter Interfaces faces: RJ-11, regulatory: FCC Part 15 Class.But it looks like you could manually ring the connected phones from the power switch, and voice connection might be able to work regardless of phone dialing format.Dialtone/ring/busy phone line simulator/tester/2 EXT.The Teltone TLS-3 is a two-line version with Caller ID signaling.
Additional Features: Portable 2-line unit, precise call progress tones, tone/rotary dialing.
Line Attenuation: -6 dB, -16 dB; 2 dB @ 1 kHz.