Zhone Technologies Network Device manual EIA RS232-C, DOC CS03

Zhone Technologies, Inc.	IMACS Product Book, Version 4
Table 8—Interface Card Specifications (continued)
EIA RS232-C	Interface between DTE and DCE Employing Serial Binary Data
Bellcore GR-63-CORE	Network Equipment-Building System (NEBS) Requirements: Physical Protections
CE EN 500 81-1	Electromagnetic compatibility generic emission standard Part 1 Residential,
	commercial and light industry
CE EN 500 82-1	Electromagnetic compatibility generic immunity standard Part 1 Residential,
	commercial and light industry
CEN EN 60 950/A2	Safety of information technology equipment including electrical business
	equipment
FCC Part 68	Requirements for Connection of Terminal Equipment Systems and Protective
DOC CS03	Apparatus to the Telephone Network
UL 1459	UL Standard for Safety of Telephone Equipment
UL 1950	UL Standard for Safety of Information Technology Equipment
CSA C22.2, No. 950	Safety of information technology equipment including electrical business
	equipment

4. WAN Cards

The WAN cards manage the flow of data through the integrated access system network. It provides the logical and electrical interface to high-speed digital facilities, which are typically physically connected via the Interface card. WAN cards take the data off the bus, which was put there by the User and Server cards, and transmit the information over a WAN link. A WAN link is typically a T1, E1, DSX-1, or HDSL facility connection. This WAN link can be either user or network link. In combination with the CPU card, the WAN card provides E1 to T1 and T1 to E1 conversion.

The WAN Cards also provide performance statistics. They are stored in memory on the IMACS’ host CPU card and retrieved upon command. The performance statistics are gathered and displayed in 15-minute intervals and retained for 24 hours. In the T1 environment, an error is defined as any CRC-6, Controlled Slip, or Out of Frame (OOF) error for ESF framing, and any Bipolar Violation (BPV), Controlled Slip, or OOF error for the D4 format. In an E1 environment, an error is defined as any CRC-4 error, Controlled Slip, or OOF error.

In the AT&T mode, two sets of registers (user and network) accumulate performance data for T1 WAN links. It is possible to view both the user and network registers, but the end user can only clear the user registers. The network only has access to the network registers, and can only clear those registers. The ANSI and E1 WAN links have only one set of registers.

For further information regarding performance, and integrated test capabilities such as loop backs, BERT Tests and Signal Quality please see Section 13, IMACS System Testing and Diagnostics.

Each port on the WAN cards can be individually configured with DSX/CEPT or CSU plug-in modules. Both CSU and DSX modules are used to connect to T1 facilities operating at 1.544 Mbps. The CEPT module is used for connection to a 2.048 Mbps E1 facility. All WAN interfaces comply with the appropriate North American and international standards. Those cards equipped with CSU or DSX/CEPT modules also act as the “near end” termination points for the Subscriber Loop Carrier (SLC-96) facilities defined in BellCore publication TR-TSY-000008, Issue 2, August 1987. Each WAN card can operate in dual channel bank, drop and insert, or full digital cross-connect mode and can perform T1-E1 conversion, including PCM A-Law to µ-Law conversion. When fully populated with 4 dual WAN cards, the IMACS supports 8 T1 or E1 connections, in any combination of T1 (DSX1 or DSX1 with CSU) , E1 (CEPT) and HDSL interfaces.

The DSX/CEPT and CSU Modules are used to connect to T1 facilities, which operate at 1.544 Mbps. The CEPT function of the DSX/CEPT module is used internationally for connection to a 2.048 Mbps E1 network. The HDSL module provides a high-speed digital subscriber line (HDSL) interface.

Each WAN card slot has eight leads connected to the Interface card slot, which can be used to support facility interfaces. The last WAN slot has all the WAN connections from the other three slots in addition to its own to support the WAN redundancy feature. The WAN card in the last slot can substitute for one of the other WAN cards.

March 2001 Page 28