Electrical Interface Cards

Electrical interface cards are used in the ONS 15454 to provide DS1, DS3, EC1, and DS3 transmux services. Table 6-7 provides a summary of the available electrical interface cards for the ONS 15454 MSPP, including the EIA types that can be used on a shelf side with each type of interface card.

Table 6-7. ONS 15454 Electrical Interface Card Summary

Card	Interface Type	Number of Ports	Bandwidth per Port	EIA Types Allowed
DS1-14/DS1N-14	DS1	14	1.544 Mbps	AMP Champ SMB UBIC-V UBIC-H
DS1-56	DS1	56	1.544 Mbps	UBIC-V UBIC-H
DS3-12/DS3N-12 DS3-12E/DS3N-12E	DS3	12	44.736 Mbps	BNC HD BNC HD Mini-BNC SMB UBIC-V UBIC-H
EC1-12	EC1	12	51.84 Mbps	BNC HD BNC HD Mini-BNC SMB UBIC-V UBIC-H
DS3/EC1-48	DS3/EC1	48	44.736 Mbps or 51.84 Mbps	HD Mini-BNC UBIC-V UBIC-H
DS3XM-6	DS3 transmux	6	44.736 Mbps	BNC HD BNC HD Mini-BNC SMB UBIC-V UBIC-H
DS3XM-12	DS3 transmux	12	44.736 Mbps	BNC HD BNC HD Mini-BNC SMB UBIC-V UBIC-H

All of the electrical interface cards are identical in appearance from their faceplate, with the exception of the card name marking. Each of the cards has three LEDs. The FAIL LED is an indication that the card is not yet ready, or that a card failure has occurred if it remains illuminated. The ACT/STBY LED is green for an active card and amber for a card in the standby state (protect card in a protection group). The SF lamp is illuminated to indicate a signal failure or a condition such as a loss of signal (LOS), a loss of frame (LOF), or a high bit error rate (BER) on one or more of the card's ports.

The sections that follow discuss each of the available electrical interface cards.

DS1-14 and DS1N-14 Interface Cards

DS1-14 and DS1N-14 cards each provide 14 DS1 ports, which operate at 1.544 Mbps. The difference between these two cards is that the DS1N-14 card contains additional circuitry, which allows it to act as the protection card in a 1:N (where N is less than or equal to 5) protection group (when installed in Slot 3 for Side A, or Slot 15 for Side B). The interface to these cards is through the shelf backplane EIA connectors. These cards can operate in any of the 12 traffic slots in the ONS 15454 chassis. A maximum of 12 DS1-14 or DS1N-14 cards can be active and providing service in a shelf. A typical shelf that is participating in a ring can have 112 working DS1 circuits using DS1-14 and DS1N-14 cards. This configuration would consist of ring OC-N cards in two slots, DS1N-14 standby cards in Slots 3 and 15, and working/active DS1-14 or DS1N-14 cards in the remaining eight slots, or 8 active cards x 14 ports per card = 112 working service ports.

DS1-56 Interface Card

The DS1-56 interface card provides 56 DS1 ports operating at 1.544 Mbps. This card can function as a working card in shelf Slots 1, 2, 16, or 17, or as a protection card in Slot 3 (protecting working cards in Slots 1 and 2) and Slot 15 (protecting working cards in Slots 16 and 17). The interface to these cards is through the shelf backplane EIA connectors. A maximum of four DS1-56 cards can be active and providing service in a shelf. A typical shelf that is participating in a ring can have 224 working DS1 circuits using active DS1-56 cards in Slots 1, 2, 16, and 17, with optional protection/standby cards in Slot 3 (protecting Slots 1 and 2) and Slot 15 (protecting Slots 16 and 17), or 4 active cards x 56 ports per card = 224 working service ports.

DS3-12, DS3N-12, DS3-12E, and DS3N-12E Interface Cards

DS3-12, DS3N-12, DS3-12E, and DS3N-12E cards each provide 12 DS3 ports, which operate at 44.736 Mbps. The distinction between the E versions (DS3-12E, DS3N-12E) and the non-E versions (DS3-12 and DS3N-12) is that the E versions have enhanced performance-monitoring capabilities that are not included in the non-E versions. This allows for earlier detection of transmission problems. In addition, each version has both regular (for example, DS3-12E) and N (for example, DS3N-12E) card types. The difference between these two cards is that the DS3N-12 and DS3N-12E cards contain additional circuitry, which allows them to act as the protection card in a 1:N (where N is less than or equal to 5) protection group (when installed in Slot 3 for Side A, or Slot 15 for Side B). The interface to these cards is through the shelf backplane EIA connectors. These cards can operate in any of the 12 traffic slots in the ONS 15454 chassis. A maximum of 12 DS3-12/DS3-12E and/or DS3N-12/DS3N-12E cards can be active and providing service in a shelf. A typical shelf that is participating in a ring can have 96 working DS3 circuits using DS3-12/DS3-12E and DS3N-12/DS3N-12E cards. This configuration would consist of ring OC-N cards in two slots, DS3N-12/DS3N-12E standby cards in Slots 3 and 15, and working/active DS3-12/DS3-12E or DS3N-12/DS3N-12E cards in the remaining 8 slots, or 8 active cards x 12 ports per card = 96 working service ports.

EC1-12 Interface Cards

EC1-12 cards each provide 12 EC-1 ports, which operate at 51.84 Mbps. The interface to these cards is through the shelf backplane EIA connectors. These cards can operate in any of the 12 traffic slots in the ONS 15454 chassis. A maximum of 12 EC1-12 cards can be active and providing service in a shelf. EC1-12 cards support 1:1 card protection only (1:N protection is not an available option with the EC1-12 cards; there is no N version of the card). For 1:1 protection, the working/active EC1-12 cards are installed in even-numbered slots (2, 4, 6, 12, 14, and 16), while the protection/standby EC1-12 cards are installed in the corresponding odd-numbered slots. For example, an active EC1-12 card in Slot 2 can be 1:1 protected by a standby EC1-12 card in Slot 1. Another example is an active EC1-12 card installed in Slot 14, protected by a standby EC1-12 card installed in Slot 15. One possible shelf configuration using 1:1 protection groups with the EC1-12 cards would provide for 60 protected EC-1 ports. One example of this type of configuration would consist of ring OC-N cards installed in Slots 5 and 6; working/active EC1-12 cards installed in Slots 2, 4, 12, 14, and 16; and protection/standby EC1-12 cards installed in Slots 1, 3, 13, 15, and 17, or 5 active cards x 12 ports per card = 60 working service ports.

DS3/EC1-48 Interface Cards

The DS3/EC1-48 interface card provides 48 DS3 (44.736 Mbps) or EC-1 (51.84 Mbps). With software releases 6 and higher, each port on the card can be user defined to operate as either a DS3 or an EC-1. This card can function as a working card in shelf Slots 1, 2, 16, or 17, or as a protection card in Slot 3 (protecting working cards in Slots 1 and 2) and Slot 15 (protecting working cards in Slots 16 and 17). The interface to these cards is through the shelf backplane EIA connectors. A maximum of four DS3/EC1-48 cards can be active and providing service in a shelf. A typical shelf that is participating in a ring can have 192 working DS3 and EC-1 circuits using active DS3/EC1-48 cards in Slots 1, 2, 16, and 17, with optional protection/standby cards in Slot 3 (protecting Slots 1 and 2) and Slot 15 (protecting Slots 16 and 17), or 4 active cards x 48 ports per card = 192 working service ports.

DS3XM-6 and DS3XM-12 Interface Card

The DS3XM-6 interface card provides six M13 multiplexing ports, each of which converts a framed DS3 into 28 VT1.5s for grooming and cross-connection. This card can function as a working card in any slot, or as a protection card in a 1:1 protection group (in an even-numbered slot, with a working card in the adjacent odd slot). The DS3XM-6 card does not support the 1:N protection scheme. The interface to these cards is through the shelf backplane EIA connectors.

The DS3XM-12 interface card provides 12 M13 multiplexing ports, each of which converts a framed DS3 into 28 VT1.5s for grooming and cross-connection. This card can function as a working card in any slot, as a protection card in a 1:1 protection group (with a working card in an adjacent slot), or as a protection card in a 1:N protection group if located in Slot 3 or Slot 15. The DS3XM-12 interface cards can operate in one of two modes: ported or portless. In ported mode, the interface to each of the 12 card ports is through the shelf backplane EIA connectors. In portless mode, the M13 DS3 is groomed to an OC-N port on an optical card in the ONS 15454 for optical connection to an external switch. A variety of configurations can be supported using this interface card, with engineering rules based on the type of cross-connect card as well as the mode of operation. Consult the Cisco ONS 15454 Reference Manual for detailed usage information.