Zhone Technologies IMACS Network Device - Manual (Page 100)

Zhone Technologies, Inc. IMACS Product Book, Version 4
March 2001 Page 96
Table 24—IP Routing Server Card Specifications
Input/Output 4 maximum (1 10-BaseT Ethernet, 3 Frame Relay Wide-Area Network)
LAN Traffic I/O 10BaseT, 10Base2
Frame Relay Traffic I/O T1, E1, fT1, fE1, V.35, RS422, EIA530
Frame Relay Port types UNI DCE, UNI DTE, NNI
MTU 1500 bytes
Traffic Bandwidth 4Mbps Full Duplex
Total Buffer Space 4 Mb DRAM
Performance 3500 Packets Per Second
No of PVCs 128
Routing Table 512 entries (up to 128 static entries)
ARP Table 100 entries (LRU)
Card Capacity Maximum 3 per IMACS
Management RFC 1315 DTE MIB, Frame Relay Service MIB, SNMP Alarm Traps per
RFC 1215
Connectivity 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 Kb/s, Bc = 0 to 2048 Kb, Be = 0 to 2048 Kb
Congestion Handling FECN, BECN
DCE Parameters N392, T391, N393 all configurable
DTE Parameters N392, T391, N393, N391 all configurable
IP subnet Topologies Point-to-point, hub-and-spoke, fully/ partially meshed subnets, and
unnumbered IP interfaces.
7. Low-Bit Rate Voice Server
The LBRV (Low Bit Rate Voice) Server card allows for the compression of 64Kbps digital voice channels into
8Kbps (plus overhead) digital sub-channels, and subsequently for the sub-channels to be multiplexed over one, two
or three composite transmission paths over Wide Area Network (WAN) links. The LBRV Server can accept voice
inputs from either analog voice ports (such as FXS, FXO, E&M) or from T1/E1 WAN links through the IMACS.
Each LBRV / ACELP (G.729) voice compression server card supports up to three composite transmission paths at
speeds of 64k, 128k or 192k, by using one, two or three WAN time slots, respectively. The composite transmission
paths use HDLC protocol as the transport mechanism. Users assign voice channels to one, two or three transmission
paths based on the need to route those channels through the network. The composite transmission paths can be
routed directly to WAN cards or to the Frame Relay Server. When routed to a Frame Relay Server (FRS), the FRS
provides a FRAD function for the compressed voice frames. No Frame Relay sub-addressing is supported, so all
voice channels within each composite transmission paths from the ACELP will be treated as a single PVC.
There are two models of the LBRV server cards: 830060 (8 port) and 831060 (16 port) capacities. A single IMACS
chassis we can support up to 3 LBRV cards for compression of a maximum of 48 voice ports.
The LBRV card performs DTMF recognition and re-construction. This means the integrity of DTMF does not
suffer from the compression/decompression processes. The LBRV card does not support MF signaling between
switches. The following is a list of the Zhone Technologies LBRV key benefits:
•
Simple topologies including Point-to-Point, Star and Mesh LBRV performs a compression and transport
function. It does NOT perform voice switching and call routing.
•
High density of channels and high volume of traffic.
•
LBRV solution is competitive with high volumes of traffic. There should be many (24+) voice channels in one
location.
•
High reliability in mission-critical installations.