ADTRAN FT1 CSA Deployment Guidelines, Table C. Loop Insertion Loss Data, Frequency Maximum Loss

5. CSA DEPLOYMENT GUIDELINES

The ADTRAN FT1 DSL system including the ADTRAN Single-Wide FT1 Repeater is designed to provide Fractional DS1 based services over loops designed to comply with Carrier Service Area (CSA) guidelines. CSA deployment guidelines are given below.

1.All loops are non-loaded only.

2.For loops with 26-AWG cable, the maximum loop length including bridged tap lengths is 9 kft.

3.For loops with 24-AWG cable, the maximum loop length including bridged tap lengths is 12 kft.

4.Any single bridged tap is limited to 2 kft.

5.Total bridged tap length is limited to 2.5 kft.

6.The total length of multi-gauge cable containing 26- AWG cable must not exceed:

12 - {(3*L26)/9} - LBTAP (in kft)

L26 = Total length of 26-AWG cable excluding bridged taps (in kft)

LBTAP = Total length of all bridged taps (in kft)

This deployment criteria is summarized in the chart shown in Figure 4.

Recommended maximum local loop loss information for PIC cable at 70°F, 135Ω, resistive termination is provided in Table C.

Table C. Loop Insertion Loss Data

Frequency	Maximum Loss
(Hz)	(dB)
3000	12.0
10,000	15.0
50,000	25.5
100,000	30.0
150,000	32.75
200,000	35.25

An approximation for the maximum amount of wideband noise on a DSL local loop as measured by a 50 kbps filter is ≤ 31 dBrn.

An approximation for the maximum level of impulse noise as measured using a 50 kbps filter on an DSL loop is ≤ 50 dBrn.

NOTE

										These approximations are to be used
	12									as guidelines only and may vary slightly
(KFT)										on different loops. Adhering to the
	11		INVALID CSA CABLE LENGTHS							guidelines	should	produce
CABLE										performance in excess of 10-7BER.
	10
COARSER)	9					TOTAL		(KFT)
							0.5
					2.5	BRIDGED
	8				2.0	1.5	TAP
								LENGTH
						1.0
(OR	7							0.0
GAUGE
	6
OF 24	5
	4
LENGTH	3
WORKING	2
	VALID CSA CABLE LENGTHS
	1
	0
	0	1	2	3	4	5	6	7	8	9
		WORKING LENGTH OF 26 GAUGE CABLE (KFT)
	Figure 4. CSA Deployment Guidelines

61245211L1-5A Section 61245211L1-5, Issue 1 5