ADTRAN AHDSL2 specifications Deployment Guidelines, Power Parameters

Table 9 lists the ADTRAN Litespan H2TU-C and H2TU-R factors needed to calculate channel bank power using Worksheet PW-1.

The Table 9 power factors are derived from the power parameters listed in Table 10.

4. DEPLOYMENT GUIDELINES

The ADTRAN HDSL2 system is designed to provide DS1-based services over loops designed to comply with carrier service area (CSA) guidelines. CSA deployment guidelines are given below.

1.All loops are nonloaded 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 multigauge cable containing

26-AWG cable must not exceed the following:

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.)

7.Recommended loop resistance for circuit deployment is ≤ 750 Ω (9 kft. of 26 AWG).

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

Table 10. Power Parameters

	ADTRAN Litespan H2TU-C
Power Bus	and AH2TU-R
+5 V	324 mA
-48 V Switch battery	125 mA
Power consumption	6 W
Power dissipation	3 W

109				INVALIDCABLETOTALLENGTHS
8				2.5	2.01.5	BRIDGEDTAPLENGTH
7						1.00.50.0	(KFT)
6
5
4
3
2		VALIDCABLELENGTHS
1	0
0		1	2	3	4
		WORKINGLENGTHOF26

Figure 4. Deployment Guidelines

Table 9. Worksheet PW-1 Factors

Configuration	A Column Factor	B Column Factor	C Column Factor	D Column Factor
ADTRAN Litespan H2TU-R	0.324	NA	NA	0.125

8 61221002L2-5B