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This appendix contains details on the MGX 8850 cabling.
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Note In all cable references, the transmit direction is away from the system, and the receive direction is towards the system. |
A trunk cable connects each T3 port on the SMB-8T3 back card to a T3 on the co-located Axis-series node. See Table B-1 and Table B-2 for details.
| Cable Parameter | Description |
|---|---|
Type | 75-ohm coax cable (RG-59 B/U for short runs, AT&T 734A for longer runs). Two per T3 line (XMT and RCV). |
Max. Length | 450 feet max. between the MGX 8850 node and DSX-3. |
Connector | Terminated in male SMB; Rx is received from trunk, Tx is transmitted to trunk. |
| Connector | Description |
|---|---|
Rx SMB | Receive T3 from trunk |
Tx SMB | Transmit T3 to trunk |
A trunk cable connects each E3 port on the SMB-8T3 back card to a E3 port on the co-located
Axis-series node. See Table B-3 and Table B-4 for details.
| Cable Parameter | Description |
|---|---|
Type | 75-ohm coax cable (RG-59 B/U for short runs, AT&T 734A for longer runs). Two per E3 line (XMT and RCV). |
Max. Length | 100 feet max. between the MGX 8850 node and CS/DSU. |
Connector | Terminated in male SMB; Rx is received from trunk, Tx is transmitted to trunk. |
| Connector | Description |
|---|---|
Rx SMB | Receive E3 from trunk |
Tx SMB | Transmit E3 to trunk |
DC power connections are made to the DC Power Entry Modules at the rear of the MGX 8850 node. (See Figure B-1.) See Table B-5 and Table B-6 for acceptable cable and wire types. Cisco normally does not provide wiring for DC-powered systems. See Table B-5 for details on DC wiring.
| Cable Parameter | Description |
|---|---|
Wiring | Three conductor, 6 AWG recommended wire gauge, min. 60 degrees Celsius insulation rating, copper conductors only. Panduit |
Connection | Panduit terminal lug (p/n LC AS6-10-L) or equivalent to fit #10-32 screws. |
Table B-6 shows the power cords that Cisco can supply.
| Cable Parameter | Description |
|---|---|
Cable | Provided with 6 feet (1.8 m) of 3-conductor wire with plug. |
Customer end plug | 20 A NEMA L620, 3-prong plug (domestic US) |
This section describes the cables that can connect to the PXM-UI-S3 card.
The maintenance (or modem) port and the control (or console) port connect a node to an ASCII terminal, workstation, or modem for remote alarm reporting or system monitoring. See Table B-7 for a description of the cabling and Table B-8 for the pinout of the associated RJ48 connector.
| Cable Parameter | Description |
|---|---|
Interface | EIA/TIA-232—both are DTE ports |
Suggested Cable | Uses only 8 conductor |
Cable Connector | RJ48, subminiature, male |
Max. Cable Length | 50 feet (15 m) |
| Pin No. | Name | Description |
|---|---|---|
1 | RTS out | Request to Send |
2 | DTR out | Data Terminal Ready |
3 | TxD | Transmit Data |
4 | GND | Chassis ground |
5 | GND | Chassis ground |
6 | RxD | Receive Data |
7 | DSR | Data Set Ready |
8 | CTS | Clear to Send |
Figure B-2 shows a modem cable that is used for connecting modems to the MGX 8850 control and maintenance ports.
The external clock input cable connects the external clock inputs through the PXM-UI-S3. The clock may be 1.544 Mbps for 2.048 Mbps. (See Table B-9 through Table B-15.)
The T1 RJ48 clock port can accept either a T1 or E1 BITS/SETS signal.
| Cable Parameter | Description |
|---|---|
Cable Type | 22 AWG, twisted pair w/shield. 100 ohm for T1; 120 ohm for E1. |
Cable Connector | RJ45 for T1. |
Max. Cable Length | 533 ft. (162 m) maximum between the MGX 8850 node and the first repeater or CSU. Selection of cable length equalizers is used. Wire build-out is required. |
Table B-10 is the pin out for the RJ48 BITS clock connector using ohm 100 termination for T1 and
120 ohm terminatio for E1. Make sure 100 ohm termination is selected when configuring the clocks. You will only need to connect the RX Ring, RX tip, and the ground signals.
| Pin No. | Signal |
|---|---|
1 | TX Ring |
2 | TX Tip |
3 | Ground |
4 | RX Ring |
5 | RX Tip |
6 | Ground |
7 | TTP Ring |
8 | TTP Tip |
The external alarm cable connects to the alarm connector on the PXM-UI-S3 card. See Table B-11 for physical characteristics of the cable and Table B-12 for the pinouts.
| Cable Parameter | Description |
|---|---|
Interface | Dry-contact relay closure. |
Wire | 24 AWG, shielded, 6-pair. |
Connector | DB-15, Subminiature, male. |
| Pin No. | Alarm | Description |
|---|---|---|
1 | Audible—Critical | Normally on |
2 | Visual—Critical | Normally on |
9 | Visual—Critical | Normally off |
4 | Audible—Major | Common |
5 | Visual—Major | Common |
12 | Visual—Minor | Normally on |
7 | Visual—Minor | Normally on |
8 | Visual—Minor | Normally off |
3 | Visual—Critical | Normally off |
11 | Audible—Major | Normally on |
10 | Visual—Critical | Common |
6 | Audible—Minor | Normally on |
14 | Audible—Minor | Common |
13 | Visual—Major | Normally off |
15 | Visual—Minor | Common |
Table B-13 shows the pin assignment on the Alarm connector on PXM-UI-S3. When audio alarm is enabled, Audio Alarm On and Audio Alarm Common pins are closed (short circuit). When the audio alarm is disabled, the Audio Alarm On and the Audio Alarm Common pins are opened (open circuit).
When visual alarm is enabled, Visual Alarm On and Visual Alarm Common pins are closed and Visual Alarm Off pin is opened. When the visual alarm is disabled, the Audio Alarm Off and the Audio Alarm Common pins are closed and Visual Alarm On pin is opened.
| Pin Name | Pin No. | Audio Enable | Audio Disable | Visual Enable | Visual Disable |
|---|---|---|---|---|---|
Critical Audio Alarm On | 1 | S | O | N/A | N/A |
Critical Audio Alarm Common | 9 | Common | Common | N/A | N/A |
Critical Visual Alarm On | 2 | N/A | N/A | S | O |
Critical Visual Alarm Common | 10 | N/A | N/A | Common | Common |
Critical Visual Alarm Off | 3 | N/A | N/A | O | S |
Major Audio Alarm On | 11 | S | O | N/A | N/A |
Major Audio Alarm Common | 4 | Common | Common | N/A | N/A |
Major Visual Alarm On | 12 | N/A | N/A | S | O |
Major Visual Alarm Common | 5 | N/A | N/A | Common | Common |
Major Visual Alarm Off | 13 | N/A | N/A | O | S |
Minor Audio Alarm On | 6 | S | O | N/A | N/A |
Minor Audio Alarm Common | 14 | Common | Common | N/A | N/A |
Minor Visual Alarm On | 7 | N/A | N/A | S | O |
Minor Visual Alarm Common | 15 | N/A | N/A | Common | Common |
Minor Visual Alarm Off | 8 | N/A | N/A | O | S |
S=Signal is shorted with Common | |||||
The standard cables that Cisco can supply for the MGX 8850 system appear in Table B-14. The suffix to the model number indicates the length of the cable. For example, 5610-50 indicates a 50-foot cable. Cables are available in standard lengths of 10 ft. (3 m), 25 ft. (7.6 m), 50 ft. (15 m), 75 ft. (22.8 m), and 100 ft. (30 m). Lengths of 100 ft. (30 m) to 600 ft. (183 m) are available through a special order.
Where applicable, Table B-14 includes the gender of the connector and the number of pins. For example, EIA/TIA-232/M25-M25 indicates a cable terminated with a male DB25 at both ends.
| Model Number | Description | Usage |
|---|---|---|
CAB-T3E3-PL-AD-6 | 75 | T3 or E3 trunk interface |
CAB-5681-06 | ASSY CBL SMB(M) to BNC(F) | T3 or E3 trunk interface |
CAB-5698-6 | T3/E3 SMB to SMB Posi-Lok | Redundant usage |
CAB-T3E3-PL-AD-6 | Posi-Lok SMB to BNC 6 Ad | T3 or E3 trunk interface |
CAB-T3E3-PL-CE-AD | T3/E3 SMB-BNC Posi-lok A | T3 or E3 trunk interface |
CAB-T3E3-PL-CE-Y | T3/E3 SMB-BNC Posi-lok Y | Redundant usage |
CAB-T3E3-PL-Y | Posi-lok SMB to BNC Y Ca | Redundant usage |
CAB-T3E3-PL-Y-6 | Posi-lok SMB to BNC 6 Y | Redundant usage |
5620 | EIA/TIA-232/M25-F25 | PXM-UI-S3 maintenance port to control terminal, Cisco WAN Manager, or external window device |
5621 | EIA/TIA-232/M25-M25 special | Control or maintenance port to modem |
5601 | Ground cable | DC power |
5670 | Molex-pigtail | DC power |
5671 | Spade lug-pigtail | DC power |
Special Y-cables provide line redundancy where applicable. Table B-15 lists the Y-cables used with various MGX 8850 cards.
| Applicable Card Name | Connector Hardware | Type/Standard Interface | Product Number |
|---|---|---|---|
PXM-UI-S3 | RJ45 | EIA/TIA-232 | CAB-5684-06 (6-inch Y) |
PXM-UI-S3 | RJ45 | EIA/TIA-232 | CAB-5684-18 |
PXM-UI-S3 | RJ45 | T1 BITS Clock | CAB-5686-06 (6-inch Y) |
PXM-UI-S3 | SMB | E1 BITS Clock | CAB-5681-06 (6-inch Y) |
PXM-UI-S3 | SMB | E1 BITS Clock | CAB-5681-18 (18-inch Y) |
PXM-UI-S3 | DB15 | Alarm Output | CAB-5607-10 (10-inch Y) |
PXM-HD | SC | MMF | CAB-MMF-Y-SC |
PXM-HD | SC | SMF | CAB-SMF-Y-SC |
AXSM | LC | SMF | N/A |
AXSM | MTRJ | MMF | N/A |
Posted: Mon Oct 2 11:02:02 PDT 2000
Copyright 1989-2000©Cisco Systems Inc.
