Table of Contents

Planning for a Cisco 6100 Series System

This appendix provides the calculation tables you need to plan total rack space and power requirements for your Cisco 6100 Series system configuration. Also included in this chapter is a table which provides calculations for acceptable levels of watts allowable in each rack.

Table A-1 provides a quick reference for configuration planning.

Table A-1: Quick Reference for Configuration Planning

Configuration	Rack Space Calculation	Power Requirements Calculation
Direct Connect with a PSC1 (without subtended network)	If you are using a Cisco 6130 MC2, complete lines 1 through 7 in Table A-3. If you are using a Cisco 6100 MC, complete lines 8 through 13 in Table A-3.	If you are using a Cisco 6130 MC, complete lines 1 through 8 in Table A-4.3 If you are using a Cisco 6100 MC, complete lines 1 through 7 in Table A-4.3
Direct Connect with a PSC (with subtended network)	If you are using a Cisco 6130 MC, complete lines 1 through 7 in Table A-3. If you are using a Cisco 6100 MC, complete lines 8 through 13 in Table A-3.	If you are using a Cisco 6130 MC, complete lines 1 through 8 in Table A-4.3 If you are using a Cisco 6100 MC, complete lines 1 through 7 in Table A-4.3
Direct Connect without a PSC (without subtended network)	Complete lines 14 through 18 in Table A-3.	Complete lines 1 through 8 in Table A-4.3
Direct Connect without a PSC (with subtended network)	Complete lines 14 through 18 in Table A-3.	Complete lines 1 through 8 in Table A-4.3
DOH4 (without subtended network)	If you are using a Cisco 6130 MC, complete lines 19 through 27 in Table A-3. If you are using a Cisco 6100 MC, complete lines 28 through 35 in Table A-3.	If you are using a Cisco 6130 MC, complete lines 1 through 11 in Table A-4.3 If you are using a Cisco 6100 MC, complete lines 1 through 7 and 9 through 11 in Table A-4.
DOH (with subtended network)	If you are using a Cisco 6130 MC, complete lines 19 through 27 in Table A-3. If you are using a Cisco 6100 MC, complete lines 28 through 35 in Table A-3.	If you are using a Cisco 6130 MC, complete lines 1 through 11 in Table A-4.3 If you are using a Cisco 6100 MC, complete lines 1 through 7 and 9 through 11 in Table A-4.

1PSC = POTS splitter chassis. 2MC = multiplexer chassis. 3Table A-4 must be completed for each MC, fan tray, and LCC. 4DOH = Digital Off-Hook.

The Cisco 6100 Series system fits in a 23-inch wide rack. See Table A-2 for individual rack space requirements.

Table A-2: Rack Space Requirements

Component	Rack Space	Height	Depth
Fan tray1	2 RUs2	3.5 in. (8.89 cm)	12 in. (30.48 cm)
MC	9 RUs	15.75 in. (40.00 cm)	12 in. (30.48 cm)
LCC3	4 RUs	7 in. (17.78 cm)	12 in. (30.48 cm)
PSC	4 RUs	7 in. (17.78 cm)	12 in. (30.48 cm)

1Leave 1 RU of space under the fan tray. This space allows for the intake plenum and for cabling back to front for the OC-3c network interface (NI) module. 2RU = rack unit. 3LCC = line concentration chassis. The LCC is used in a DOH configuration only.

Warning Systems using a Cisco 6100 chassis must connect to the network through a PSC to provide the secondary lightning protection required by Network Equipment Building Systems (NEBS).

Depending on your configuration type, plan accordingly so that the central office (CO) rack accommodates your needs. Use Table A-3 to calculate the rack space necessary for your Cisco 6100 Series system configuration. The total amount of rack space should not exceed 42 RUs. If your total configuration exceeds 42 RUs, either replan your configuration or use more than one rack to house the Cisco 6100 Series system components.

Depending on your configuration type, calculate the required watts and amperage for each Cisco 6100 Series component. After you calculate the required watts and amperage, determine the fuse amperage for each component that is wired to the fuse and alarm panel. Use Table A-4 to calculate the fuse amperage necessary for each of your Cisco 6100 Series system components.

Table A-4: Fuse Calculation for the Cisco 6100 Series System Components

Component	Instructions	Calculation
MC1,2
1a	If you are using CAP ATU-C modules, multiply 8W by the total number of modules to add to the MC.3
1b	If you are using DMT-2 ATU-C modules, multiply 12W by the total number of modules to add to the MC.
1c	If you are using STU-C modules, multiply 8W by the total number of modules to add to the MC.
1d	Add the amounts for lines 1a through 1c.
2	Enter 11W for the DS3 STM4 for the subtending host (if you are installing a subtended network).
3	Enter 48W for the DS3 or OC-3c NI5 module.
4	Enter 7W for the SC6 module.
5	Add lines 1d, 2, 3, and 4. This is the total watts required to power the MC.
6	Divide line 5 by 48. This is the nominal amperage for the MC.
7	Multiply line 6 by 1.25. This is the fuse amperage needed to run the MC in your Cisco 6100 Series system.
Fan Tray
8	A 1.25A fuse is required for each fan tray wired to the fuse and alarm panel. A fan tray must be installed under each Cisco 6130 MC.
LCC
9	Enter 25W for the LCC.
10	Divide line 9 by 48. This is the nominal amperage for the LCC.
11	Multiply line 10 by 1.25. This is the fuse amperage needed to run the LCC in your Cisco 6100 Series system.

1For a Direct Connect configuration, the maximum number of MCs is two per rack. For a DOH configuration, the maximum number of MCs is one per DOH configuration. 2Complete this section for each subtending host. 3You can only use CAP ATU-C modules in a DOH configuration. 4STM = subtend host module. 5NI = network interface. 6SC = system controller.

Use Table A-5 to determine if the watts in your rack exceed acceptable levels. If the watts exceed the acceptable levels outlined in the table, either replan your configuration or use more than one rack to house the Cisco 6100 Series system components.

Table A-5: Calculation for Acceptable Levels for Watts for the Cisco 6100 Series System

Component	Line	Instructions	Calculation
Direct Connect Configuration
	1	Total number of MCs in the rack---Maximum is two MCs per rack (do not count subtended nodes).
	2	Total number of fan trays in the rack---Must equal line 1.
MC no. 1	3a	If you are using CAP ATU-C modules, multiply 8W by the total number of modules to add to MC no. 1.
	3b	If you are using DMT-2 ATU-C modules, multiply 12W by the total number of modules to add to MC no. 1.
	3c	If you are using STU-C modules, multiply 8W by the total number of modules to add to MC no. 1.
	3d	Add the amounts for lines 3a through 3c.
MC no. 2	4a	If you are using CAP ATU-C modules, multiply 8W by the total number of modules to add to MC no. 2.
	4b	If you are using DMT-2 ATU-C modules, multiply 12W by the total number of modules to add to MC no. 2.
	4c	If you are using STU-C modules, multiply 8W by the total number of modules to add to MC no. 2.
	4d	Add the amounts for lines 4a through 4c.
Fan tray	5	Multiply 32.4W by the total number of fan trays on line 2.
SC module	6	Multiply 7W by the total number of MCs on line 1.
NI module	7	For a DS3 or OC-3c NI module, multiply 48W by the total number of MCs on line 1.
	8	Add lines 3d, 4d, and 5 through 7 for total watts needed with your Direct Connect configuration.
Digital Off-Hook Configuration
	9	Total number of MCs in the rack---One per DOH configuration.
	10	Total number of LCCs in the rack---Up to five per DOH configuration.
	11	Total number of fan trays in the rack---Must equal line 9.
MC	12	Multiply 8W by the total number of CAP ATU-C modules to add to the MC.
LCC	13	Multiply 25W by the total number of LCCs on line 10.
Fan tray	14	Multiply 32.4W by the total number of fan trays on line 11.
SC module	15	Multiply 7W by the total number of MCs on line 9.
NI module	16	For a DS3 or OC-3c NI module, multiply 48W by the total number of MCs on line 9.
	17	Add lines 12 through 16 for total watts needed with your DOH configuration.
Subtended Network Configuration1
	18	Total number of subtended nodes in the rack.
DS3 STM	19	Enter 11W on line 19 for your DS3 STM in the subtending host.
DS3 NI module	20	Multiply 48W by the total number of subtended nodes on line 18.
Subtended node no. 1	21a	If you are using CAP ATU-C modules, multiply 8W by the total number of modules to add to subtended node no. 1.
	21b	If you are using DMT-2 ATU-C modules, multiply 12W by the total number of modules to add to subtended node no. 1.
	21c	If you are using STU-C modules, multiply 8W by the total number of modules to add to subtended node no. 1.
	21d	Add the amounts for lines 21a through 21c.
Subtended node no. 2	22a	If you are using CAP ATU-C modules, multiply 8W by the total number of modules to add to subtended node no. 2.
	22b	If you are using DMT-2 ATU-C modules, multiply 12W by the total number of modules to add to subtended node no. 2.
	22c	If you are using STU-C modules, multiply 8W by the total number of modules to add to subtended node no. 2.
	22d	Add the amounts for lines 22a through 22c.
Subtended node no. 3	23a	If you are using CAP ATU-C modules, multiply 8W by the total number of modules to add to subtended node no. 3.
	23b	If you are using DMT-2 ATU-C modules, multiply 12W by the total number of modules to add to subtended node no. 3.
	23c	If you are using STU-C modules, multiply 8W by the total number of modules to add to subtended node no. 3.
	23d	Add the amounts for lines 23a through 23c.
Subtended node no. 4	24a	If you are using CAP ATU-C modules, multiply 8W by the total number of modules to add to subtended node no. 4.
	24b	If you are using DMT-2 ATU-C modules, multiply 12W by the total number of modules to add to subtended node no. 4.
	24c	If you are using STU-C modules, multiply 8W by the total number of modules to add to subtended node no. 4.
	24d	Add the amounts for lines 24a through 24c.
Subtended node no. 5	25a	If you are using CAP ATU-C modules, multiply 8W by the total number of modules to add to subtended node no. 5.
	25b	If you are using DMT-2 ATU-C modules, multiply 12W by the total number of modules to add to subtended node no. 5.
	25c	If you are using STU-C modules, multiply 8W by the total number of modules to add to subtended node no. 5.
	25d	Add the amounts for lines 25a through 25c.
Subtended node no. 6	26a	If you are using CAP ATU-C modules, multiply 8W by the total number of modules to add to subtended node no. 6.
	26b	If you are using DMT-2 ATU-C modules, multiply 12W by the total number of modules to add to subtended node no. 6.
	26c	If you are using STU-C modules, multiply 8W by the total number of modules to add to subtended node no. 6
	26d	Add the amounts for lines 26a through 26c.
	27	Add lines 19, 20, 21d, 22d, 23d, 24d, 25d, and 26d for total watts needed with your subtended network configuration.
Total Watts Required
	28	Add lines 8, 17, and 27. If you have more than one subtending host, include those totals as well. This is the total watts required to run your Cisco 6100 Series system.
Acceptable Level for Watts per Rack
	29	If you are using natural convection, divide line 28 by 7. If this exceeds 134.7W, replan your configuration.
	30	If you are using forced convection, divide line 28 by 7. If this exceeds 181.2W, replan your configuration.

1Complete this section for each subtending host.

Posted: Tue Nov 16 14:57:11 PST 1999
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