Table 4-4. Commercial Technical Schedules

TM 11-5895-1012-10

Note 1. Schedule 4A parameters are the same as C1 parameters

Note 2. Schedule 4B parameters are the same as C2 parameters

Note 3. Schedule 4C parameters are the same as C3 parameters

Nate 4. CCITT M.102 parameters are the same as C2 parameters, except that loss IS relative to 800 Hz instead of 1000 Hz

Note 5. DCS Technical schedules S1 and D1 compare to Commercial C2 Technical schedules for frequency response and envelope delay die

tortion.

Note 6 DCS Technical schedule S3 compares to Commercial C5 Technical schedules for frequency response and envelope delay distortion

4-41. Test Descriptions

DCS facility using substandard equipment should

Each Test Description (TD) includes the test arrange-

determine the technical reasons why the equipment

ment, equipment configuration, and test procedure.

will not operate within established standards, and

With the exception of those parameters which are not

determine a standard which the equipment can con-

applicable to all types of channels, each analog

sistently meet. As a minimum, equipment will at least

parameter test description includes date for testing

meet the specifications contained in the technical or

the following types of channels: voice frequency chan-

manufacturer manual, where specified. Requests for

channels (0-50 kHz), 48 kHz channels

waivers from DCA performance standards will be sub

mitted through appropriate DCA regions to cognizant

DCA areas for approval, with an information copy to

appropriate O&M activities. Requests will contain the

technical justification for the waiver and the proposed

interim standard for the equipment. DCA areas will

review the technical data and proposed and where

4-42. Digital Distortion Standards

appropriate grant the waiver. If necessary, full resolu-

The digital distortion standards contained in this para-

tion of the waiver request will be carried to the Direc-

an extract from other publications. It is

tor, DCA.

that some equipment currently used in the

a. Application. These standards apply to out-of-

will nut operate within these standards. Each

service testing performed at the TCF patch bay. Tech