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>AT&T SynJ

SynJ® Cordless business phone system. Just what you need! Supports 4 lines and up to 11 users


With extended range, we've got your business covered!

See how the AT&T SynJ extendable range SMB system can keep your office connected


SynJ<sup>®</sup> 4-line corded/cordless system
Expandable to 11 Users with 4 PSTN Lines    

Work wherever your work is!


With AT&T SynJ, your employees can work here or there. It's perfect for warehouse / distribution centers, car sales and rental lots, nurseries and other businesses where mobility is key.


Extend your communications


With SynJ, you can add up to 6 AT&T DECT 6.0 repeaters to extend your cordless mobility up to half a mile.* Go farther–and further–with AT&T DECT 6.0 cordless handsets or an AT&T TL7800 headset.


The SynJ difference

Increase sales

Respond to all your customers all the time, no matter how far you are from your desk. Extended range means no more missed calls and no more wasted time!

Give yourself more time

Auto attendants on all four lines, line status appearances and built-in voicemail ensure all calls are handled right the first time. The result: more time to focus on your business!

Get off to a quick start

With SynJ, you have support for up to 11 users and 4 analog lines right out of the box. All you need is the RJ11 connection and AC power.

Go easy on yourself

SynJ's user-friendly features mean business as usual without any of the hassles of learning a new system.


Build your own system with 3 simple steps!

Start with the base system


SB67138 (Includes 1 base deskset and 1 cordless handset)

Add cordless desksets or cordless handsets





Add a cordless headset and repeaters


TL7800 (max 1 per system)

SB67128 (max 6 per system)


*Open range test was performed by Wyle Laboratories, an independent commercial test facility. ‘”Up to half a mile” cordless mobility range, "Up to 980 feet" repeater range and "up to 500 feet" cordless headset range refers to the maximum open field range. Actual range may vary depending on intervening obstacles. Maximum operable range distances are based on all-indoor use.


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