Column headings in table I show those quality control tests that may
be run while circuits are in service. The only telephone tests that
may be performed daily without removing circuits from service are the
noise and signal level tests.
signal level and listen tests.
listen and current level tests.
signal level and peak distortion tests.
DD Form 1697 (figure 3-3) shows test descriptions for narrowband
The corresponding TD in table II that does NOT specify
parameter V1 is
TD 1 NB.
TD 2 NB.
TD 3 NB.
TD 4 NB.
Assume that you are preparing to condition a circuit which bears a
CCSD number of DUAC-T116 and a TSO number of D91357/T116-07.
Exercises 12 through 15 are based on the above situation.
What does the first letter in the CCSD signify?
This circuit originates in Denmark.
The normal mode of transmission is duplex.
Equipment in this circuit is designed to pass high-speed data