Ttc actema tpi 550B bri isdn portable test set $299.00

Ttc actema tpi 550B bri isdn portable test set $299.00

Comes with ac adaptor, operation manual, and what you see in the pictures. The unit passes self-test. Battery holds charge and seems to be good.
The Model 550B's operating modes allow it to function as a NT1 (Network Termination), as a TE (Terminal Equipment), as both (NT1/TE), or as LT (Line Termination). It may be connected to either the DSL (Digital Subscriber Loop) U interface, or the S/T interface. It is compatible with AT&T AMI, and 2B1Q DSL interfaces, and EBS (P-Phone) and POTS Line Interfaces. The Model 550B allows placement of additional loss on the circuit, either at the "LINE" U Interface or the "S/T" interface for margin analysis testing.
The Model 550B ISDN Portable Test Set allows you to select a loopback for either of the B channels, or for the full bandwidth (2B+D). The model 550B also responds to network controlled loopbacks at the NT1.
We try to describe each item accurately, however we are not experts on every item we have for sale. If you don’t see it in the picture then assume it is not included, if it arrives with your item then you will pleasantly surprised rather than disappointed.
P A Y M E N T & S H I P P I N G
S A T I S F A C T I O N G U A R A N T E E D
A L L I T E M S A R E S O L D A S I S