Common Channel Signaling (CCS) Cards

You can install CCS cards in any slot except the slots designated for the Power Supply cards (PSC) and Matrix Controller Series 3 cards. Before installing cards, make sure the DIP switches and jumpers are set properly for your configuration. Refer to the card’s Hardware Product Description for details.

You must install Redundant I/O and Standby I/O cards in the rear slots that correspond to the slots occupied by the line and standby line cards in the front of the chassis.

This cable connects two chassis mounted, adjacent CCS I/O cards in redundant applications. The cable has a DB-9 connector on each end (CCS I/O Redundancy Cable ).

Important! Both CCS I/O cards must be installed in adjacent slots in the rear of the chassis. Both CCS I/O card slots must correspond to their associated SS7 PQ cards installed in the front of the chassis.

2 Connect one end of the cable into the DB connector labeled "LINK" on the front panel on one of the CCS I/O cards (Adjacent CCS I/O Cards ).

3 Connect the other end of the cable into the DB connector labeled "LINK" on the front panel the adjacent CCS I/O (CCS I/O Cards Cabled Together ).

Important! If the cable is disconnected from either card, the standby card is reset and, if the cable has not been reconnected, redundancy is disabled.

Two Integrated Services Digital Network Primary Rate (ISDN PRI) cards used with one ISDN PRI Redundant I/O card provide complete redundancy if the active ISDN card fails.

A mirror image of the active card’s primary and secondary D channels is copied to the standby card. If the active card fails or you remove it, the standby card takes over and manages call processing. All calls in a connected state are retained while others are purged. If you reset the active card, it switches over to standby.

The redundancy feature enables the switch to process without error once it successfully receives and acknowledges a signaling packet or Message Signal Unit (MSU).

You can insert ISDN PRI cards in any adjacent slots in the front of the chassis. You must insert the ISDN PRI Redundant I/O card in the rear
I/O slots that correspond to the front slots occupied by the ISDN PRI cards, as shown in ISDN Redundancy Installation .

The Digital Access Signaling System2/Digital Private Network Signaling System (DASS2/DPNSS) card provides D channel packet processing and call control procedures for the CSP 2090, CSP 2110, and CSP 2040. Both variants are similar to European ISDN Primary Rate Interface. They allow simplified Link Access Procedure (Layer 2) and call control of 30 B channels using a D channel on Timeslot 16 (30B + D) over a 64 Kbps interface.

A single DASS2/DPNSS card can be inserted into any line card slot in the front of the chassis, except for the slots reserved for Matrix Controller cards and Power Supply cards.

Always press the STOP button on the SS7 PQ, SS7 Series 3, or ISDN Series 3 line card in a redundant card pair configuration before removing or inserting the corresponding I/O card.

For example, in a redundant SS7 PQ, SS7 Series 3, or ISDN Series 3 card pair configuration, be aware that the redundant line card may reset when removing or inserting the primary I/O card. If this occurs, the system will lose calls.

See Common Channel Signaling.

The Matrix Controller Series 3 card is based on Motorola’s 750 PowerPC processor (68750). It is often referred to as the Matrix Controller.

See Signaling System Number Seven.

See Integrated Services Digital Network.

ISDN. Network architecture based on digital transmission, switching, and common channel signaling. Basic configurations include 2B+D called a Basic Rate Interface, and 23+D called a Primary Rate Interface. Outside North America, PRI is 30B+D.

An I/O card that supports redundancy and has external connections. It sits behind whichever line card is originally designated as "active." Compare to "Standard I/O card" and "Standby I/O card."

PRI. One of two basic ISDN interface configurations providing 23 (30 outside of North America) Bearer channels (64 Kbps data) and 1 Data signaling channel (16 Kbps control and signaling data). Commonly refered to as ISDN PRI or 23B+D interface (30B+D outside of North America).