The TLS-3 is a compact, portable central office or PBX simulator. Packed with standard features at an affordable price, the TLS-3B offers two loop start lines and a single talk path. Other basic features include:

	Calling party control
	Tone and rotary (pulse) dialing capabilities
	Secondary dial tone
	Hot line ringdown - Automatically rings another station(s) when the handset is lifted.
	Audio port - Standard 5-pin DIN jack for recording or playing voice or tones.

Programmable Parameters

	Primary/secondary telephone numbers up to 16 digits
	Off-hook modes
	Network response time delays
	Test tone frequency and cadence
	Line attenuation

Dial Up Test Tones

	Dial tone
	Busy signal
	Reorder tone
	Ringback
	Silence

Precise Call Progress Tones

	Dial tone
	Busy signal
	Reorder tone
	Ringback

Caller ID

	Type I (SDMF/MDMF)
	Visual message waiting indication
	Privacy blockage
	Out-of-area calls
	Transmission errors