Table Of Contents

Cisco ONS 15310-MA SDH Shelf Assembly Hardware

1.1  Installation Overview

1.2  Rack Installation

1.2.1  Mounting Brackets

1.2.2  Mounting a Single Node

1.2.3  Mounting Multiple Nodes

1.3  Electrical Interface Assemblies

1.4  Front Door

1.5  Rear Cover

1.6  Power and Ground Description

1.7  Cable Description and Installation

1.7.1  Cabling Types

1.7.2  Fiber Cable Installation

1.7.3  Coaxial Cable Installation

1.7.4  E1 Cable Installation

1.7.5  Alarm Cable Installation

1.7.6  BITS Cable Installation

1.7.7  UDC Cable Installation

1.8  Cable Routing and Management

1.8.1  Standard Cable Management Bracket

1.8.2  Extended Cable Management Bracket

1.9  Fan-Tray Assembly

1.9.1  Fan Speed and Power Requirements

1.9.2  Fan Failure

1.9.3  Air Filter

1.9.4  Orderwire

1.10  Cards and Slots

Cisco ONS 15310-MA SDH Shelf Assembly Hardware

---

This chapter provides a description of Cisco ONS 15310-MA SDH shelf hardware. Instructions for installing equipment are provided in the Cisco ONS 15310-MA SDH Procedure Guide.

Chapter topics include:

•Installation Overview

•Rack Installation

•Electrical Interface Assemblies

•Rear Cover

•Cable Description and Installation

•Fan-Tray Assembly

•Cards and Slots

---

Note The Cisco ONS 15310-MA SDH assembly is intended for use with telecommunications equipment only.

---

Warning The intra-building ports of the ONS 15310-MA SDH are suitable only for connection to intra-building or unexposed wiring or cabling. The intra-building ports of ONS 15310-MA SDH MUST NOT be metallically connected to interfaces that connect to the OSP or its wiring. These interfaces are designed for use as intra-building interfaces only (Type 2 or Type 4 ports as described in GR-1089-CORE, Issue 4) and require isolation from the exposed OSP cabling. The addition of Primary Protectors is not sufficient protection in order to connect these interfaces metallically to OSP wiring.

1.1  Installation Overview

You can mount the ONS 15310-MA SDH in a 19-inch (482.6 mm) or 600x600 mm ETSI rack.

The ONS 15310-MA SDH is powered using -48 VDC power. DC power connections are accessed from the rear of the shelf assembly. ONS 15310-MA SDH Ethernet and optical ports are accessible at the front of the shelf assembly, and electrical connections (E1, E3/DS-3) are accessible at the rear of the shelf assembly through electrical interface assemblies (EIAs).

When installed in an equipment rack, the ONS 15310-MA SDH assembly is typically connected to a fuse and alarm panel that provides centralized alarm connection points and distributed power for the ONS 15310-MA SDH. Fuse and alarm panels are third-party equipment and are not described in this documentation. If you are unsure about the requirements or specifications for a fuse and alarm panel, consult the documentation for that product.

---

Note In this chapter, the terms "ONS 15310-MA SDH" and "shelf assembly" are used interchangeably. In the installation context, these terms have the same meaning. Otherwise, shelf assembly refers to the physical steel enclosure that holds cards and connects power, and ONS 15310-MA SDH refers to the entire system, both hardware and software.

---

---

Note The ONS 15310-MA SDH installations are suitable for Network Telecommunication facilities and locations where NEC are applicable.

---

Install the ONS 15310-MA SDH in compliance with your local and national electrical codes:

•United States: National Fire Protection Association (NFPA) 70; United States National Electrical Code

•Canada: Canadian Electrical Code, Part I, CSA C22.1

•Other countries: If local and national electrical codes, are not available, refer to IEC 364, Part 1 through Part 7

Detailed compliance and safety information is provided in the Cisco Optical Transport Products Safety and Compliance Information document that ships with the Cisco ONS 15310-MA SDH.

1.2  Rack Installation

The ONS 15310-MA SDH is easily mounted in a 19-inch (482.6 mm) or 600x600 mm equipment rack. The shelf assembly can be mounted so that it projects five inches from the front of the rack. It mounts in both EIA-standard and Telcordia-standard racks. A single shelf assembly is 10.67 inches (27.1 mm) wide and occupies 6 RUs (10.5 in. [267.6 mm]) in a rack when installed with a standard cable management bracket. If an extended cable management bracket is installed below the shelf assembly, an additional RU is occupied, for a total of 7 RUs (12.25 in. [311.1 mm]).

The ONS 15310-MA SDH measures 10.44 inches (26.51 cm) high, 10.67 inches (27.10 cm) wide, and 12 inches (20.48 cm) deep. Figure 1-1 shows the dimensions of the ONS 15310-MA SDH shelf assembly.

Figure 1-1 ONS 15310-MA SDH Shelf Assembly Dimensions

1.2.1  Mounting Brackets

---

Caution Use only the fastening hardware provided with the ONS 15310-MA SDH to prevent loosening, deterioration, and electromechanical corrosion of the hardware and joined material.

---

---

Caution When mounting the ONS 15310-MA SDH in a frame with a nonconductive coating (such as paint, lacquer, or enamel) use either the thread-forming screws provided with the ONS 15310-MA SDH shipping kit or remove the coating from the threads to ensure electrical continuity.

---

The shelf assembly ships without mounting brackets. You need to purchase brackets suitable either for use with 19-inch (482.6mm) or 600x600mm racks.

1.2.2  Mounting a Single Node

Mounting the ONS 15310-MA SDH in a rack requires a minimum of 10.5 inches of vertical rack space. To ensure that the mounting is secure, use four #12-24 mounting screws for each side of the shelf assembly. If the larger cable router is used, 12.5 inches of rack space is required.

Figure 1-2 shows a single ONS 15310-MA SDH being mounted in a rack, using a universal bracket.

Figure 1-2 Mounting a Single ONS 15310-MA SDH in a Rack

1.2.3  Mounting Multiple Nodes

Most standard 2200 mm racks can hold numerous (up to 6 or 7) ONS 15310-MA SDH nodes and a fuse and alarm panel.

1.3  Electrical Interface Assemblies

High-density EIAs are attached to the ONS 15310-MA SDH shelf assembly backplane to provide up to 126 transmit and receive E1 connections through six Champ connectors per side (A and B) or six transmit and receive E3/DS-3 connections through six BNC connectors per side. The EIAs are designed tosupport E1, E3/DS-3 signals. The appropriate cable assembly is required depending on the type of signal.

You can install EIAs on one or both sides of the ONS 15310-MA SDH. As you face the rear of the shelf assembly, the right side is the A side (15310-EIA-HD-A) and the left side is the B side (15310-EIA-HD-B).

Figure 1-3 shows the J connectors on the A- and B-side high-density EIAs installed on the ONS 15310-MA SDH.

Figure 1-3 High-Density EIA Connectors

To install the EIA on the rear of the shelf assembly, you must first remove the standard sheet metal covers. The EIAs use the same screw holes as the standard sheet metal covers, but they use three holes for panhead screws and two holes for jack screws.

When installed with the standard door and cabling on the backplane, the ONS 15310-MA SDH shelf measures approximately 13.7 inches (34.8 cm) deep when fully populated with backplane cables.

1.4  Front Door

The ONS 15310-MA SDH is orderable with a front door. You must install the ground strap on the door after you install the door (Figure 1-4).

Figure 1-4 ONS 15310-MA SDH Door Ground Strap

1.5  Rear Cover

The ONS 15310-MA SDH is orderable with an optional, clear-plastic, rear cover. The rear cover protects the connectors installed on the back plane of the chassis.

Rear cover specifications are:

•Environmental

–Operating temperature: -40 to +65 degrees Celsius (-40 to +149 degrees Fahrenheit)

–Operating humidity: 5 to 95%, noncondensing

•Dimensions

–10.59 in. x 10.44 in. x 0.5 in. (26.9 cm x 26.52 cm x 1.27 cm)

–Weight: Approximately 0.67 lb (300 g)

1.6  Power and Ground Description

This section describes how to connect the ONS 15310-MA SDH shelf assembly to the power supply. For detailed procedures, refer to the "Install the Cisco ONS 15310-MA SDH" chapter in the Cisco ONS 15310-MA SDH Procedure Guide. Terminate the chassis ground (located on both sides of the rear of the shelf assembly or at the bottom of the shelf assembly) to either the office ground or rack ground before you install the power. Use the grounding lug to attach the #6 AWG ground cable to the #10-32 mount ground lug on the shelf assembly according to local site practice.

Ground one cable to ground the shelf assembly. Terminate the other end of the rack ground cable to ground according to local site practice.

---

Note Additional ground cables may be added depending on the local site practice.

---

Figure 1-5 shows the grounding holes on the bottom of the ONS 15310-MA SDH.

Figure 1-5 Ground Holes on the Bottom of the ONS 15310-MA SDH Shelf Assembly

Figure 1-6 show the grounding holes on the sides of the ONS 15310-MA SDH.

Figure 1-6 Ground Holes on the Left and Right Sides of the ONS 15310-MA SDH Shelf Assembly

---

Caution Always use the supplied ESD wristband when working with a powered ONS 15310-MA SDH. Plug the wristband cable into either ESD jack, located on the far left and right slots of the shelf assembly.

---

---

Note Use an external disconnect for service purposes and install it according to local site practice.

---

The ONS 15310-MA SDH DC power provides redundant -48 VDC power terminals on the rear of the chassis. The terminals are labeled A and B and are located at each end of the shelf assembly.

To install redundant power feeds, use four power cables and one ground cable. For a single power feed, only two power cables and one ground cable are required. Use #12 AWG power cables and a #6 AWG ground cable and, to ensure circuit overcurrent protection, use a conductor with low impedance. The conductor must have the capability to safely conduct any fault current that might be imposed. Do not use aluminum conductors.

---

Note The battery return connection (+48Vdc) can be treated as DC-I, as defined in Telcordia GR-1089-CORE Issue 4.

---

---

Caution If the system loses power or the 15310E-CTX-K9 card is reset, you must reset the ONS 15310-MA SDH clock unless the node has been previously provisioned to use Simple Network Time Protocol (SNTP). SNTP updates the clock over the LAN.

---

1.7  Cable Description and Installation

This section describes fiber-optic, E3/DS-3 (coaxial), E1 (64-pin Champ), UDC, and twisted-pair cables.

1.7.1  Cabling Types

The following types of cables are used with the ONS 15310-MA SDH:

•Optical cables: The STM1/4/16 signals operate over fiber spans through SFP optics, including intermediate-reach (IR) and long-reach (LR) SFPs. Specification references can be found for the interface in ITU G.957 and Telcordia GR-253. See the "Fiber Cable Installation" section for more information. Make sure the fiber cables do not bend excessively; maintaining a proper bend radius prevents damage to the optical cable.

•E1 cables: E1 cables (shielded, twisted-pair) connect to the electrical ports at the rear of the shelf assembly using Champ cable connectors. E1 cables carry E1 traffic to and from the ONS 15310-MA SDH. The ONS 15310-MA SDH supports up to three transmit and three receive Champ-64 connectors on each side of the shelf assembly, for a maximum of 63 E1 signals per side of the shelf, 28+28+7

A compatible E1 cable is available from Lorom Industrial Co., LTD.

Lorom Industrial Co., LTD.
15th Floor, Room 2, Number 78, Sec 2
AN-HO Road
Taipei, Taiwan
Phone: 886-2-2706-6037
Fax: 886-2-2704-6396
POC: Monica.Huang@lorom.com

The ACS part number and description are: T015654-Length. Cable assembly with the cable exit at 1 & 33. This cable solution offers two screw points on the cable head for attachment, see Figure 1-7 , and is equivalent in characteristics to the defacto 1161A rated cable.

Figure 1-7 ACS Cable T015654

Refer to Table 2-1 for compatible E1 cables available from Lorom Indrustrial Co., LTD.

Lorom Industrial Co., LTD.
15th Floor, Room 2, Number 78, Sec 2
AN-HO Road
Taipei, Taiwan
Phone: 886-2-2706-6037
Fax: 886-2-2704-6396

Table 1-1 E1 cables for wire-wrap connection

ACS Part Numbers	Length	Description
PCAM90SPA0PC001	25 feet	Connector-Wire Wrap, DSX
PCAM90SPA1OC001	50 feet	Connector-Wire Wrap, DSX
PCAM90SPA3MC001	100 feet	Connector-Wire Wrap, DSX
PCAM90SPA7IC001	200 feet	Connector-Wire Wrap, DSX

•Coaxial cables: Coaxial cables connect to the electrical ports using BNC cable connectors. Coaxial cables carry E3/DS-3 traffic to and from the ONS 15310-MA SDH. The ONS 15310-MA SDH supports up to three transmit and three receive coaxial connectors on each shelf assembly.

Warning The E1/E3/DS-3 ports on the ONS15310-MA are intra-building ports and are suitable only for connecting to shielded cabling grounded at both ends. Statement 1084

•RJ-45 cables: RJ-45 cables connect to the LAN, CRAFT, and UDC ports. An unshielded twisted-pair (STP) #22 or #24 AWG wire is required for the CRAFT and UDC ports. Unshielded twisted-pair is sufficient for the alarm and LAN(rear). 10/100-Mbps RJ-45 Ethernet STP (Shielded Twisted Pair) cables are used to connect the CE-100T-8 and ML-100T-8 cards.

•Alarm and timing (BITS) cables: The Alarm In port requires a shielded cable terminated with a DB-37 connector; Alarm Out requires a shielded cable terminated with a DB-25 connector; and the building integrated timing supply (BITS) ports require DB-9 connectors or a DB9BIT=BB9 to wire wrap adapter.

1.7.2  Fiber Cable Installation

To install fiber-optic cables on the ONS 15310-MA SDH, a fiber cable with an LC connector must be connected to an SFP. SFPs are installed in the SFP port on the ONS 15310-MA SDH. Each LC connector contains the transmit (Tx) and receive (Rx) signal for that port. Cisco recommends that you label the transmit and receive ports and the working and protection fibers at each end of the fiber span to avoid confusion with cables that are similar in appearance.

You can route fiber cables through the optional fiber guide, installed at the bottom of the shelf assembly (Figure 1-8).

Figure 1-8 Shelf Assembly with Fiber Guide Installed

---

Caution You must provide some type of strain relief for the cables, using either a tie-bar or other site-specific solution.

---

---

Note Clean all fiber connectors thoroughly. Dust particles can degrade performance. Put caps on any fiber connectors that you do not use.

---

1.7.3  Coaxial Cable Installation

For E3/DS-3 traffic, the ONS 15310-MA SDH uses coaxial cables and connectors. Cisco recommends connecting a 735A coaxial cable to a patch panel. Use a compatible male BNC connector to connect the cable to the E3/DS-3 ports. The E3/DS-3 cables should be terminated with BNC connectors on the ONS 15310-MA SDH side and BNC connectors on the client side.

Due to the minimal space between BNC connectors and E1 connectors, you might require a special tool for inserting and removing BNC EIAs (Figure 1-9).

Figure 1-9 BNC Insertion and Removal Tool

This tool can be obtained with P/N 227-T1000 from:

Amphenol USA (www.amphenol.com)
One Kennedy Drive
Danbury, CT 06810
Phone: 203 743-9272 Fax: 203 796-2032

This tool can be obtained with P/N RT-1L from:

Trompeter Electronics Inc. (www.trompeter.com)
31186 La Baya Drive
Westlake Village, CA 91362-4047
Phone: 800 982-2629 Fax: 818 706-1040

1.7.4  E1 Cable Installation

The ONS 15310-MA SDH uses 64-pin Champ connector cabling for E1 connections.

Table 1-2 lists the Champ connector pin assignments and the corresponding EIA connector mapping for connectors J8 and J9 on the EIA installed on the A side, and connectors J21 and J22 on the EIA installed on the B side.

Table 1-2 Champ Connector Pin Assignments—Side-A EIA, Connectors J8 and J9; Side-B EIA, Connectors J21 and J22 

Signal	Pin	Signal	Pin
Ring Port 1	1	Tip Port 1	33
Ring Port 2	2	Tip Port 2	34
Ring Port 3	3	Tip Port 3	35
Ring Port 4	4	Tip Port 4	36
Ring Port 5	5	Tip Port 5	37
Ring Port 6	6	Tip Port 6	38
Ring Port 7	7	Tip Port 7	39
Ring Port 8	8	Tip Port 8	40
Ring Port 9	9	Tip Port 9	41
Ring Port 10	10	Tip Port 10	42
Ring Port 11	11	Tip Port 11	43
Ring Port 12	12	Tip Port 12	44
Ring Port 13	13	Tip Port 13	45
Ring Port 14	14	Tip Port 14	46
Ring Port 15	15	Tip Port 15	47
Ring Port 16	16	Tip Port 16	48
Ring Port 17	17	Tip Port 17	49
Ring Port 18	18	Tip Port 18	50
Ring Port 19	19	Tip Port 19	51
Ring Port 20	20	Tip Port 20	52
Ring Port 21	21	Tip Port 21	53
Ring Port 22	22	Tip Port 22	54
Ring Port 23	23	Tip Port 23	55
Ring Port 24	24	Tip Port 24	56
Ring Port 25	25	Tip Port 25	57
Ring Port 26	26	Tip Port 26	58
Ring Port 27	27	Tip Port 27	59
Ring Port 28	28	Tip Port 28	60
Unused	29	Unused	61
Unused	30	Unused	62
Unused	31	Unused	63
Unused	32	Unused	64

Table 1-3 lists the Champ connector pin assignments and the corresponding EIA connector mapping for connectors J10 and J11 on the EIA installed on the A side, and connectors J23 and J24 on the EIA installed on the B side.

Table 1-3 Champ Connector Pin Assignments—Side-A EIA, Connectors J10 and J11; Side-B EIA, Connectors J23 and J24 

Signal	Pin	Signal	Pin
Ring Port 29	1	Tip Port 29	33
Ring Port 30	2	Tip Port 30	34
Ring Port 31	3	Tip Port 31	35
Ring Port 32	4	Tip Port 32	36
Ring Port 33	5	Tip Port 33	37
Ring Port 34	6	Tip Port 34	38
Ring Port 35	7	Tip Port 35	39
Ring Port 36	8	Tip Port 36	40
Ring Port 37	9	Tip Port 37	41
Ring Port 38	10	Tip Port 38	42
Ring Port 39	11	Tip Port 39	43
Ring Port 40	12	Tip Port 40	44
Ring Port 41	13	Tip Port 41	45
Ring Port 42	14	Tip Port 42	46
Ring Port 43	15	Tip Port 43	47
Ring Port 44	16	Tip Port 44	48
Ring Port 45	17	Tip Port 45	49
Ring Port 46	18	Tip Port 46	50
Ring Port 47	19	Tip Port 47	51
Ring Port 48	20	Tip Port 48	52
Ring Port 49	21	Tip Port 49	53
Ring Port 50	22	Tip Port 50	54
Ring Port 51	23	Tip Port 51	55
Ring Port 52	24	Tip Port 52	56
Ring Port 53	25	Tip Port 53	57
Ring Port 54	26	Tip Port 54	58
Ring Port 55	27	Tip Port 55	59
Ring Port 56	28	Tip Port 56	60
Unused	29	Unused	61
Unused	30	Unused	62
Unused	31	Unused	63
Unused	32	Unused	64

Table 1-4 lists the Champ connector pin assignments and the corresponding EIA mapping for connectors J12 and J13 on the A-side EIA, and connectors J25 and J26 on the B-side EIA.

Table 1-4 Champ Connector Pin Assignments—Side-A EIA, Connectors J12 and J13; Side-B EIA, Connectors J25 and J26 

Signal	Pin	Signal	Pin
Not used	1	Not used	33
Not used	2	Not used	34
Ring Port 57	3	Tip Port 57	35
Ring Port 58	4	Tip Port 58	36
Ring Port 59	5	Tip Port 59	37
Ring Port 60	6	Tip Port 60	38
Ring Port 61	7	Tip Port 61	39
Ring Port 62	8	Tip Port 62	40
Ring Port 63	9	Tip Port 63	41
Unused	10	Unused	42
Unused	11	Unused	43
Unused	12	Unused	44
Unused	13	Unused	45
Unused	14	Unused	46
Unused	15	Unused	47
Unused	16	Unused	48
Unused	17	Unused	49
Unused	18	Unused	50
Unused	19	Unused	51
Unused	20	Unused	52
Unused	21	Unused	53
Unused	22	Unused	54
Unused	23	Unused	55
Unused	24	Unused	56
Unused	25	Unused	57
Unused	26	Unused	58
Unused	27	Unused	59
Unused	28	Unused	60
Unused	29	Unused	61
Unused	30	Unused	62
Unused	31	Unused	63
Unused	32	Unused	64

1.7.5  Alarm Cable Installation

The alarm cables attach to the rear of the ONS 15310-MA SDH at the ALARM In and ALARM Out ports. The other ends of the cables plug into the alarm-collection equipment. Terminate the ends of these cables according to local site practice. The pins on the ALARM In and ALARM Out ports correspond to the 32 external alarm inputs and the 8 external alarm outputs (controls) that you can define using Cisco Transport Controller (CTC).

Table 1-5 shows the default input alarm pinouts and the corresponding alarm numbers assigned to each port. Refer to this table when connecting alarm cables to the ONS 15310-MA SDH.

Table 1-5 Default Alarm Pin Assignments—Inputs 

DB-37 Pin Number	Function	DB-37 Pin Number	Function
1	Alarm 1	20	Alarm 18
2	Alarm 2	21	Alarm 19
3	Alarm 3	22	Alarm 20
4	Alarm 4	23	Alarm 21
5	Alarm 5	24	Alarm 22
6	Alarm 6	25	Alarm 23
7	Alarm 7	26	Alarm 24
8	Alarm 8	27	Common 17-24
9	Common 1-8	28	Alarm 25
10	Alarm 9	29	Alarm 26
11	Alarm 10	30	Alarm 27
12	Alarm 11	31	Alarm 28
13	Alarm 12	32	Alarm 29
14	Alarm 13	33	Alarm 30
15	Alarm 14	34	Alarm 31
16	Alarm 15	35	Alarm 32
17	Alarm 16	36	Common 25-32
18	Common 9-16	37	N/C
19	Alarm 17	—	—

Table 1-6 shows the default output alarm pinouts and the corresponding alarm numbers assigned to each port. Refer to this table when connecting alarm cables to the ONS 15310-MA SDH.

Table 1-6 Default Alarm Pin Assignments—Outputs 

DB-25 Pin Number	Function	DB-25 Pin Number	Function
1	Out 1+	14	Out 2+
2	Out 1-	15	Out 2-
3	—	16	Out 3+
4	—	17	Out 3-
5	—	18	Out 4+
6	—	19	Out 4-
7	—	20	Out 5+
8	—	21	Out 5-
9	—	22	Out 6+
10	—	23	Out 6-
11	—	24	Out 7+
12	Out 8+	25	Out 7-
13	Out 8-	—	—

1.7.6  BITS Cable Installation

The BITS clock cable (terminated with a DB-9 connector or with a DB9BIT=BB9 to wire wrap adapter) attaches to the BITS port on the ONS 15310-MA SDH. The other end of the cable plugs into the BITS clock, terminate this end of the cable according to local site practice. In case the DB9BIT=BB9 to wire wrap adapter is used on the ONS15310-MA, the cable shield must be wire-wrapped to the GND pin of the wire wrap adapter.

The 15310-MA SDH has one BITS input and one BITS output. The BITS inputs and outputs have corresponding pins on the DB-9 BITS ports. When connecting BITS cable to the ONS 15310-MA SDH, see Table 1-7 for the BITS cable pin assignments.

Table 1-7 BITS Cable Pin Assignments 

DB-9 Pin Number	Function
1	BITS Output+
2	BITS Output-
3	—
4	—
5	—
6	BITS Input+
7	BITS Input-
8	—
9	—

---

Note Refer to Telcordia SR-NWT-002224 for rules about how to provision timing references.

---

1.7.7  UDC Cable Installation

The 64K, EIA/TIA-232 user data channel (UDC) interface provides F1 and F2 byte input and output. When connecting the UDC cable to the ONS 15310-MA SDH, see Table 1-8 for the UDC cable pin assignments. Unshielded twisted-pair #22 or #24 AWG wire is required for the UDC ports.

Table 1-8 UDC Cable Pin Assignments 

RJ-45 Pin Number	RS-232/64K Mode
1	TX +
2	TX -
3	RX +
4	—
5	—
6	RX -
7	—
8	—

1.8  Cable Routing and Management

Two types of cable management brackets are available for the ONS 15310-MA SDH shelf assembly: the standard bracket, which ships with the ONS 15310-MA SDH ship kit, and the extended bracket, which ships as a separate orderable part. You can install either bracket under the shelf assembly.

1.8.1  Standard Cable Management Bracket

The standard cable management bracket has one area in the rear that can be used for routing cables. Fiber-optic cable can be routed through the rear trough of the bracket. Ethernet cables can be passed through the front of the bracket to be bundled and secured using tie-wraps or other site-specific materials.

Figure 1-10 shows the installation of the standard cable management bracket.

Figure 1-10 Installing the Standard Cable Management Bracket

1.8.2  Extended Cable Management Bracket

The extended cable management bracket has two areas that can be used for routing cables, one in the front and one in the rear. Fiber-optic cables can be routed through the smaller front trough, and Ethernet cables can be routed through the larger rear trough.

Figure 1-11 shows the installation of the extended cable management bracket.

Figure 1-11 Installing the Extended Cable Management Bracket

1.9  Fan-Tray Assembly

The fan-tray assembly is located at the top of the ONS 15310-MA SDH shelf assembly, under the air filter, rear exhaust, and air inlet. The fan tray is a removable drawer that holds four fans, the fan-control circuitry, and the fuse-control circuitry for the ONS 15310-MA SDH. After you install the fan tray, you should only need to access it if a fan failure occurs.

The new fan-tray assembly (FTA2) has a fuse-control circuitry that is capable of blowing a low-current fuse (1/4-A to 1/2-A). This is useful when you are using power distribution equipment that has a low current fuse connected in parallel with the main fuse to help detect any failures in the main fuse. The fuse-control circuitry independently draws a short current (approximately 900 mA) for about 0.7 seconds every 15 minutes (at 24 degrees Celsius or 120 degrees Fahrenheit), alternating between power supply inputs A and B. This allows the ONS 15310-MA SDH to blow the low current fuse when there is a failure or loss of the main fuse and report an alarm (FAN alarm).

The front of the fan-tray assembly has CRIT, MAJ, and MIN alarm LEDs that illuminate if a Critical, Major, or Minor alarm is present anywhere on the ONS 15310-MA SDH assembly.

1.9.1  Fan Speed and Power Requirements

Fan speed is controlled by temperature sensors on the 15310E-CTX-K9 card. The sensors measure the input air temperature at the fan-tray assembly. Fan speed options are low, medium, and high.

1.9.2  Fan Failure

If one or more fans fail on the fan-tray assembly, replace the entire assembly. You cannot replace individual fans. The red Fan Fail LED on the front of the fan tray illuminates when one or more fans fail. For fan-tray replacement instructions, refer to the Cisco ONS 15310-MA SDH Troubleshooting Guide. The red Fan Fail LED is unlit after you install a working fan tray.

---

Note The red Fan Fail LED on the front of the fan tray illuminates when only one power source is connected to the chassis, or any fuse blows.

---

1.9.3  Air Filter

The ONS 15310-MA SDH contains a reusable air filter (15310-MA SDH-FTF) that is installed above the fan-tray assembly. The reusable filter is made of a gray, open-cell, polyurethane foam that is specially coated to provide fire and fungi resistance. Spare filters should be kept in stock.

---

Caution Do not operate an ONS 15310-MA SDH without the mandatory fan-tray air filter.

---

1.9.4  Orderwire

Orderwire allows a craftsperson to plug a phone set into an ONS 15310-MA SDH and communicate with craftspeople working at other ONS 15310-MA SDH nodes or other facility equipment. The orderwire is a pulse code modulation (PCM) encoded voice channel that uses E1 or E2 bytes in the MSOH and in the regenerator section overhead.

The FTA allows simultaneous either local (RSOH signal) or express (MSOH signal) orderwire channels on an SDH ring or particular optics facility. Express orderwire also allows communication through regeneration sites when the regenerator is not a Cisco device.

You can provision orderwire functions with CTC similar to the current provisioning model for DCC channels. In CTC, you provision the orderwire communications network during ring turn-up so that all network elements (NEs) on the ring can communicate with one another. Orderwire terminations (that is, the optics facilities that receive and process the orderwire channels) are provisionable. Both express and local orderwire can be configured as on or off on a particular SDH facility. The ONS 15310-MA SDH supports up to four orderwire channel terminations per shelf. This allows linear, single ring, dual ring, and small hub-and-spoke configurations. Keep in mind that orderwire is not protected in ring topologies such as multiplex section-shared protection ring (MS-SPRing) and subnetwork connection protection (SNCP).

---

Note The Cisco ONS 15310-MA SDH Orderwire functionality is compatible with Cisco ONS 15454 Orderwire functionality.

---

---

Caution Do not configure orderwire loops. Orderwire loops cause feedback that disables the orderwire channel.

---

The ONS 15310-MA SDH implementation of both local and express orderwire is broadcast in nature. The line acts as a party line. Anyone who picks up the orderwire channel can communicate with all other participants on the connected orderwire subnetwork. The local orderwire party line is separate from the express orderwire party line. Up to four STM-N facilities for each local and express orderwire are provisionable as orderwire paths.

The FTA supports selective dual tone multifrequency (DTMF) dialing for telephony connectivity, which causes specific or all ONS 15310-MA SDH FTAs on the orderwire subnetwork to "ring." The ringer/buzzer resides on the FTA. There is also a "ring" LED that mimics the FTA ringer. It flashes when a call is received on the orderwire subnetwork. A party line call is initiated by pressing *0000 on the DTMF pad.

The orderwire ports are standard RJ-11 receptacles. The pins on the orderwire ports correspond to the tip and ring orderwire assignments.

Table 1-9 describes the orderwire pin assignments.

Table 1-9 Orderwire Pin Assignments 

RJ-11 Pin Number	Description
1	Four-wire receive ring
2	Four-wire transmit tip
3	Two-wire ring
4	Two-wire tip
5	Four-wire transmit ring
6	Four-wire receive tip

When provisioning the orderwire subnetwork, make sure that an orderwire loop does not exist. Loops cause oscillation and an unusable orderwire channel.

Figure 1-12 shows the standard RJ-11 connectors used for orderwire ports. Use a shielded RJ-11 cable.

Figure 1-12 RJ-11 Cable Connector

1.10  Cards and Slots

---

Caution Always use the supplied ESD wristband when working with a powered ONS 15310-MA SDH. Plug the wristband cable into either ESD jack, located on the far left and right slots of the shelf assembly.

---

The ONS 15310-MA SDH has six card slots. Slots 3 and 4 are dedicated to the common-control (15310E-CTX-K9) cards. Slots 1, 2, 5, and 6 can accommodate the following traffic cards:

•Ethernet: CE-100T-8 card, ML-100T-8, CE-MR-6 card

•Electrical: E1_21_E3_DS3_3 card, E1_63_E3_DS3_3 card

These cards have plugs at the rear of the card. When the ejectors are fully closed, the card plugs into the assembly backplane.

When no card is installed in a card slot, a filler card should be installed. Use a 15310E-CTX-K9 filler card in empty 15310E-CTX-K9 slots (Slots 3 and 4), and an expansion filler card in empty traffic card slots (Slots 1, 2, 5, and 6).

Figure 1-13 shows card installation for the ONS 15310-MA SDH.

Figure 1-13 Installing a Card in an ONS 15310-MA SDH

Table 1-10 lists the number of ports, line rates, connector options, and connector locations for ONS 15310-MA SDH electrical, Ethernet, and optical interfaces.

Table 1-10 Port Line Rates, Connector Types, and Locations 

Interface	Ports	Line Rate per Port	Connector Type	Connector Location
E1	21/63	2.048 Mbps	Champ	Rear of the 15310-MA SDH shelf assembly
DS-3	3	44.736 Mbps	BNC	Rear of the 15310-MA SDH shelf assembly
E3	3	34 Mbps	BNC	Rear of the 15310-MA SDH shelf assembly
STM1/STM4/STM16	2	155.52 Mbps (VC4) 622.08 Mbps (VC4-4c)	LC	15310E-CTX-K9 card faceplate
Ethernet (CE-100T-8 card)1	8	10/100 Mbps	RJ-45	CE-100T-8 card faceplate
Ethernet (CE-MR-6 card)	6	10/100/1000 Mbps	LC (SFP), Copper (SFP)-RJ45	Faceplate
Ethernet (ML-100T-8 card)2	8	10/1000 Mbps	RJ-45	ML-100T-8 card faceplate

1 The CE-100T-8 card with PID 15310-CE-100T-8 is not compatible with the ONS 15310-MA SDH. The 15310-P-CE-100T-8 is compatible with the ONS 15310-MA SDH shelf assemblies. 2 The ML-100T-8 card with PID 15310-ML-100T-8 is not compatible with the ONS 15310-MA SDH. The 15310-P-ML-100T-8 is compatible with the ONS 15310-MA SDH shelf assemblies.