Zhone Technologies Network Device manual ACS-FRS Advanced Communication Server Frame Relay Server

Zhone Technologies, Inc. IMACS Product Book, Version 4

4. ACS-FRS Advanced Communication Server - Frame Relay Server

The 881160 FRS card concentrates multiple N x 56K or N x 64K frame relay data streams onto one or more Nx56/64K links of the IMACS. In addition to frame relay concentration, the card encapsulates data for Nx56/64K HDLC or SDLC data streams. RED frames can be discarded rather than forwarded to the FRS end-point screen. The ACS-FRS uses flag sharing, meaning that the closing flag of one frame will be the opening flag of the following frame.

The frame relay server software (v1.8) runs on the card, which provides up to 68 logical ports. Up to 128 permanent virtual circuits (PVCs) can be configured on a single card. The aggregate speeds of all ports associated with each FRS cannot exceed 8 Mbps.

The FRS has a maximum of 68 ports. When all four “C” ports are used to interface to other cards such as the HSU, 64 ports are left to interface to the external cross-connect.

The FRS card also maintains detailed performance statistics both on a per port and a per PVC level.

Frame Relay Server Specifications

There can be up to three Frame Relay server cards in an IMACS chassis in non-redundant operation. The Frame Relay Server performance figure of 4000 Frames/Second was obtained using 64 byte frames. The following hardware and firmware must be included in an IMACS to add Frame Relay Server operation:

•880360- CPU Control Card with 8 T1/E1 Cross Connect (redundant-capable)

•892360/892460 - 8 T1/E1 Interface card w/ 128K NVRAM

•881160 - Advanced Communication Server (ACS) with 68 logical Frame Relay ports

•60500 - Host Firmware version 5.0.0 or above

•62180 - ACS Frame Relay Server firmware

Table 22—Frame Relay Server Specifications

Input/Output Ports	68 logical ports (maximum)
Input Traffic Ports	T1, E1, fT1, fE1, V.35, RS422, EIA530, OCU-DP, FRAD
Output Traffic ports	T1, E1, fT1, fE1, V.35, RS422, EIA530, OCU-DP, FRAD
Output Port types/Input	UNI DCE, UNI DTE, NNI, Nx64K/56K FRAD
Maximum Frame Size	4K Bytes
Traffic Bandwidth	8 Mbps, Full Duplex
Performance	4,000 Frames per second (maximum)
Number of PVCs	128
System Capacity	Maximum 3 per IMACS
Management	RFC1315, DTE MIB, Frame Relay Service MIB, SNMP Alarm Traps per RFC 1215
Connectivity	Craft Interface, SNMP or TELNET
LMI Options	Q.933 Annex A, ANSI T1.617 Annex D, LMI (Gang of 4), None
Information Rates	CIR = 0 to 2048 Kbps, Bc = 0 to 2048 Kb, Be = 0 to 2048 Kb
Congestion Handling	FECN, BECN
Circuit Priorities	4 (Version 2.0 or above)

March 2001 Page 81