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This appendix describes specifications for different facets of the MAX, and discusses cabling requirements. This appendix covers these topics:
This section covers cabling pinouts for the Control Monitor, Palmtop Controller, and MIF interfaces.
The Control port uses a standard DE-9 female connector that conforms to the EIA RS-232 standard for serial interfaces. Table C-1 lists all MAX models that use the RS-232 pinouts.
Note: *Pin 9 is not active (Ring Indication signal not supplied).
Table C-2 specifies the pins and corresponding functions of the Palmtop Controller jacks.
Note: O is Out (from the MAX toward the Palmtop).
Table C-3 lists the specifications you need to adapt the Palmtop port for use as a Control Monitor or MIF interface through a vt-100 terminal.
Figure C-1. Control Monitor and MIF Palmtop port and cable
The base unit of a MAX has an Ethernet interface that supports the physical specifications of IEEE 802.3 and IEEE 802.14 with Ethernet 2 (Ethernet/DIX) framing. It provides a single Ethernet interface that auto-senses the Ethernet type to which it is connected. The following types are supported:
- 10Base-T (Unshielded Twisted Pair): Twisted pair Ethernet and IEEE 802.3 (10Base-T) with an RJ-45 connector, labeled LAN UTP.
- 100 Base-T: 100 Mbits/s Baseband Modulation on Twisted Pair
The Ethernet address used to identify the Ethernet interface resides in the MAX unit's motherboard.
To install the Ethernet interface, you must have either of the equipment described in the sections below.
You need a twisted-pair Ethernet cable and a dual twisted-pair cable terminated with RJ-45 modular jacks.
Use an EIA/TIA 568 or IEEE 802.3 10Base-T cable.
You need a twisted-pair Ethernet cable and a dual twisted-pair cable terminated with RJ-45 modular jacks.
Use one of the following cables:100BASE-T2, 100BASE-T4 (not very popular), 100BASE-TX, or 100BASE-FX.
This section provides the specifications for the MAX unit's T1/PRI interface and covers cabling requirements.
Your requirements differ depending on whether or not you enable the internal CSU on each T1/PRI port on the MAX. Enable the internal CSU by setting the Net/T1 > Line Config > Line N > Front End parameter to CSU. Disable the internal CSU by setting Front End to DSX.
Table C-4 lists CSU specifications
.
Note: During loss of power or whenever the MAX restarts, a relay closure returns the T1 PRI
signal to the WAN; that is, the T1 PRI line is looped back. However, if the MAX is configured
for framing-compatible drop-and-insert functionality, all channels of line #1 are passed to line
#2. Note that line #1 and line #2 of a MAX expansion module always loop back on loss of
power, regardless of how they are configured.
The maximum cable distance between the T1/PRI WAN interface equipment and the MAX should not exceed 655 feet (200 m) for a MAX without CSUs. Measure the line length and record it when you install the MAX. You must specify this length when you configure the Line Profile parameters. For more information, see the MAX Reference Guide.
Use only cables specifically constructed for transmission of T1/PRI signals. The cables should meet standard T1 attenuation and transmission requirements. The following specifications are recommended:
- 100 Ohm
- Two twisted pairs, Category 3 or better
The WAN interface cables and plugs described in the following sections are available for the MAX unit's WAN interfaces.
Install this cable when the WAN interface transmits on pins 5 and 4 and receives on pins 2 and 1. Refer to Figure C-2 and Table C-5.
Figure C-2. RJ48C/RJ48C crossover cable
Before installing this cable, verify that the WAN interface transmits on pins 2 and 1 and receives on pins 5 and 4. Refer to Figure C-3 and Table C-6.
Figure C-3. RJ48C/RJ48C straight-through cable specifications
Before installing this cable, verify that the WAN interface transmits on pins 3 and 11 and receives on pins 1 and 9. Refer to Figure C-4 and Table C-7.
Figure C-4. RJ48C/DA-15 straight-through cable
Before installing this cable, verify that the WAN interface transmits on pins 1 and 9 and receives on pins 3 and 11. Refer to Figure C-5 and Table C-8.
Figure C-5. RJ48C/DA crossover cable
The WAN side of the cable connects to dual bantam jacks. Refer to Figure C-6 and Table C-9.
Figure C-6. RJ48C/Bantam straight-through cable
This plug loops the transmit signal back to the MAX
.
Table C-11 lists the pins on RJ48C sockets on the MAX used for T1/PRI WAN interface. Only pins 1, 2, 4, and 5 are used. The remaining pins are not connected.
The MAX is compatible with both AT&T and Northern Telecom central office switches, and can access all T1/PRI switched digital services offered by AT&T's ACCUNET Switched Digital Services:
- MCI 56 kbps and 64 kbps services
- Sprint Switched 56 kbps and 64 kbps services
- MultiRate and GloBanD (and GVPN in CCITT countries) PRI network services
Note: The MAX can access only Switched-56 kbps services on a T1 access line or a
Switched-56 line.
For a listing of the compatible switch types, see the Switch Type parameter in the MAX Reference Guide. In addition to switched circuits, the MAX can connect to nailed-up circuits, and to aggregate nailed-up and switched circuits.
This section provides the specifications for the MAX unit's E1/PRI interface and covers cabling requirements.
During loss of power or whenever the MAX restarts, a relay closure returns the E1 PRI signal to the WAN; that is, the E1 PRI line is looped back. However, if the MAX is configured for framing-compatible drop-and-insert functionality, all channels of line #1 are passed to line #2. Note that line #1 and line #2 of a MAX Net/E1 expansion module always loop back on loss of power, regardless of how they are configured.
The WAN interface cables and plugs described in this section are available for the MAX unit's WAN interfaces. Use only the cable specifically constructed for transmission.
Install this cable when the WAN interface transmits on pins 5 and 4 and receives on pins 2 and 1. Refer to Figure C-7 and Table C-12.
Figure C-7. RJ48C/RJ48C crossover cable
.
Before installing this cable, verify that the WAN interface transmits on pins 2 and 1 and receives on pins 5 and 4. Refer to Figure C-8 and Table C-13.
Figure C-8. RJ48C/RJ48C straight-through cable specifications
Before installing this cable, verify that the WAN interface transmits on pins 3 and 11 and receives on pins 1 and 9. Refer to Figure C-9 and Table C-14.
Figure C-9. RJ48C/DA-15 straight-through cable
Before installing this cable, verify that the WAN interface transmits on pins 1 and 9 and receives on pins 3 and 11. Refer to Figure C-10 and Table C-15.
Figure C-10. RJ48C/DA crossover cable
The WAN side of the cable connects to dual bantam jacks. Refer to Figure C-11 and Table C-16.
Figure C-11. RJ48C/Bantam straight-through cable
This cable adapts a modular E1 port on the MAX to coaxial cable E1 lines. You must also set the jumpers within the MAX for 50 Ohm service. Refer to Figure C-12 and Table C-17.
Figure C-12. MAX 6000 BNC to RJ-48C straight-through cable
Table C-18 lists the pins on RJ48C sockets on the MAX used for E1/PRI WAN interface. Only pins 1, 2, 4, and 5 are used. The remaining pins are not connected.
Note: E1/PRI models are also equipped with BNC connectors.
This section provides the specifications for the MAX unit's ISDN BRI interface.
Warning: To reduce the risk of fire, communication cable conductors must be 26 AWG or
larger.
Attention: Afin de reduire les risques d'incendie, les fils conducteurs du cable de communication doivent etre d'un calibre minimum de 26 AWG (American Wire Gauge), c'est-a-dire d'un minimum de 0,404 mm.
Warnung: Um Feuerrisiken zu reduzieren, müssen die Kommunikationskabel-Anschlüße 26 AWG oder größer sein.
The Net/BRI module (MX-SL-8BRIN) connects to the WAN through a network termination (NT1) device. You must install a cable from the NT1 that ends in a 100Ohm termination. The maximum distance between the NT1 and its termination is 3280 feet (1000 m). You can install the Net/BRI module anywhere along the length of the cable. Use only cable specifically constructed for ISDN BRI interfaces.
Note: In Belgium, install 10 m of cable between the Net/BRI module and the NT1.
Significant data errors can result from using shorter cables.
Each ISDN BRI line provided by the Host/BRI module (MX-SL-8BRIT) must end in a 100Ohm termination. The maximum cable distance between the Host/BRI and its termination is 3280 feet (1000 m). You can install the local ISDN BRI device anywhere along the length of the cable. Use only cable specifically constructed for ISDN BRI "S" interfaces.
This section describes the cabling requirements, timing requirements, and interface types for the serial host ports on the MAX.
The MAX unit's serial host ports are compatible with the following three electrical standards:
The MAX also supports the following dialing/answering protocols at any of its serial host ports:
Selection of the proper cable between a serial host port and the serial device ensures:
- The proper mapping of pinouts from the MAX to the application equipment
- Proper voltage levels
In the cable wiring tables that follow, the MAX is the DCE (Data Circuit-Terminating Equipment) device, while the host equipment is the DTE (Data Terminal Equipment) device. The serial host interface cabling tables use the abbreviations listed in Table C-19. Note that the Send timing and Receive timing clocks are supplied to the host by the MAX.
The sections that follow list the pinouts for different types of V.35 cabling.
This cable connects the MAX to the V.35 port of a Cisco router that uses V.25 bis dialing. Figure C-13 and Table C-20 list the V.35/V.25 bis cable pinouts.
Figure C-13. V.35/V.25 bis cable to Cisco
Note: *Pin positions separated by commas are jumped to each other.
This cable connects the MAX to the V.35 ports of a wide variety of equipment. A female-to-male V.35 gender changer is included when you order the cable. Table C-21 lists the V.35 cable pinouts.
Figure C-14. V.35 cable to generic serial host
Note: *Pin positions separated by commas are jumped to each other.
This cable connects the MAX to the V.35 ports of a wide variety of equipment using RS-366 dialing. A female-to-male V.35 gender changer is included when you order the cable. Figure C-15 and Table C-22 list the V.35/RS-366 cable pinouts.
Figure C-15. V.35/RS-366 cable to generic serial host
This cable connects the MAX to the V.35 port of the Compression Labs Rembrandt II codec with support for RS-366 dialing. Figure C-16 and Table C-23 list the V.35/RS-366 cable pinouts.
Figure C-16. V.35/RS-366 cable to CLI codec
This cable connects the MAX to the V.35 port of the PictureTel codec with support for RS-366 dialing. Figure C-17 and Table C-24 list the V.35/RS-366 cable pinouts.
Figure C-17. V.35/RS-366 cable to PictureTel
Note: *Pin positions separated by commas are jumped to each other.
Ascend supplies a variety of RS-366 cables. The sections that follow list the pinouts for different types of RS-366 cabling.
This cable connects the MAX to the RS-449 port of a Video Telecom codec with support for RS-366 dialing. Figure C-18 and Table C-25 list the RS-449 / RS-366 / DB-37 cable pinouts.
Figure C-18. RS-449/RS-366/DB-37 cable to Video Telecom codec
Note: * Pin positions separated by commas are jumped to each other. This cable does not
support terminal timing.
This cable connects the MAX to the RS-449 ports of a wide variety of equipment using RS-366 dialing. A female-to-male DB-37 gender changer is included when you order the cable. Figure C-19 and Table C-26 list the RS-449/RS-366 cable pinouts.
Figure C-19. RS-449/RS-366 cable to generic serial host
Note: *Pin positions separated by commas are jumped to each other.
This cable connects the MAX to the RS-449 ports of a wide variety of equipment. A female-to-male DB-37 gender changer is included when you order the cable. Table C-27 lists the RS-449 cable pinouts.
Figure C-20. RS-449 cable to generic serial host
.
Note: To manufacture an RS-449 cable for Cisco routers, use the above wiring list and
connect the following DB-37 pins to SGND:
- DSR- (pin 29)
- CD- (pin 31)
- CTS- (pin 27).
X.21 cabling
Ascend supplies a single X.21 cable.
If your host is equipped with an X.21 interface, Figure C-21 and Table C-28 list the pinouts for the host cable.
Figure C-21. X.21 cable to generic serial host
Note:
Table C-29 specifies the recommended maximum length of the cable between the MAX and the serial host equipment. Longer distances at the specified data rates are possible when you use terminal timing, and still longer distances are supported by the installation of the Ascend RPM, a hardware device that provides an extended distance high-speed link between the MAX and the serial host equipment.
The MAX unit's serial WAN interface supports nailed-up connections to the WAN. Data packets from the MAX unit's bridge/router module can use this interface, but bit streams from devices connected to the MAX unit's serial host ports cannot.
The MAX unit's serial WAN port is compatible with the following two electrical standards:
In the cable wiring tables that follow, the MAX is the DTE (Data Terminal Equipment) that connects to a DCE (Data Circuit-Terminating Equipment) device through its serial WAN port. The MAX receives the Send timing and Receive timing clocks from the DCE device.
You connect a V.35 cable to the V.35 port of a DCE device. Table C-30 describes the V.35 cable pinouts.
You can connect an RS-449 cable to the RS-449 port of a DCE device. The RS-449 cable has the pinouts described in
Table C-31.
Note: *Pin positions separated by commas are jumped to each other.
|
Network Interface Specifications
| - 18,000 feet over twisted copper pair
- AT&T Point-to-Point
- 2B1Q signaling compatible
- data only at 128 Kbps (symmetric)
Compatible with:
- ANSI T1.601-1991
- CNET specification technique ST/LAA/ELR/DNP/822
- ETSI DTR/TM 3002
- Recommendation CCITT G961
- most of the commercially available 2B1Q band ISDN BRI terminal adapters, bridges and routers
|
|
Loopback Testing
|
- Line loopback test
- corrupt CRC test
- request corrupt CRC test
- monitoring
|
techpubs@eng.ascend.com
Copyright © 1998, Ascend Communications, Inc. All rights
reserved.