Zhone Technologies IMACS Network Device - Manual (Page 32)

Zhone Technologies, Inc. IMACS Product Book, Version 4
March 2001 Page 28
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
DOC CS03 Requirements for Connection of Terminal Equipment Systems and Protective
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.