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MT8985 参数 Datasheet PDF下载

MT8985图片预览
型号: MT8985
PDF下载: 下载PDF文件 查看货源
内容描述: CMOS ST- BUS⑩系列增强型数字式开关 [CMOS ST-BUS⑩ FAMILY Enhanced Digital Switch]
分类和应用: 开关
文件页数/大小: 18 页 / 326 K
品牌: MITEL [ MITEL NETWORKS CORPORATION ]
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MT8985  
ISDN Desktops  
(2B+D)  
• • • • • •  
Analog Connections  
• • • • • •  
Server 2  
Server 1  
T1  
T1  
n x 64  
Connections  
(e.g. Video)  
E1  
Access to  
Public  
Network  
Server 3  
Server 4  
T1/E1  
Isochronous Network  
Figure 8a - Private Isochronous Network  
The information being exchanged between cards  
through the MVIP interface on every computer as  
well as between computers through T1 or CEPT links  
is, in general, of mixed type where 64Kb/s and  
N*64Kb/s channels are grouped together. When  
such a mixed type of data is transferred between  
cards within one chassis or from one computer to  
another, the sequence integrity of the concatenated  
channels has to be maintained. The MT8985 device  
suits this application and can be used to form a  
complete non-blocking switch matrix of 512 channels  
(see Figure 9). This allows 8 pairs of ST-BUS  
streams to be dedicated to the MVIP side whereas  
the remaining 8 pairs are used for local ancilliary  
functions in typical dual T1/E1 interface applications  
(Figure 10).  
predictable data transfer delays that can be  
implemented at a reasonable cost. The Low Latency  
Isochronous Network is one of the alternatives that  
system designers have chosen to accommodate this  
requirement (see Figure 8a). This network can be  
implemented using existing TDM transmission media  
devices such as ISDN Basic (S or U) and Primary  
rates trunks (T1 and CEPT) to transport mixed voice  
and data signals in grouped time slots; for example,  
2B channels in case of ISDN S or U interfaces or up  
to 32 channels in case of a CEPT link.  
Figure 8b shows a more detailed configuration  
whereby several PCs are connected to form an  
Isochronous network. Several services can be  
interconnected within a single PC chassis through  
the standardized Multi Vendor Integration Protocol  
(MVIP). Such an interface allows the distribution and  
interconnection of services like voice mail, integrated  
voice response, voice recognition, LAN gateways,  
key systems, fax servers, video cards, etc.  
Another application of the MT8985 in an MVIP  
environment is to build an ISDN S-interface card  
(Figure 11). In this card, 7 pairs of ST-BUS streams  
are connected to the MVIP interface while the  
remaining pair is reserved for the interconnection of  
MITEL MT8930 (SNIC), MT8992 (H-PHONE) and  
the MVIP interface.  
2-53  
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