Zhone IMACS 8000, Руководство пользователя

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Reference Guide 4-15
Applications Router Server Card (8000-Router)
• PBX to PBX trunk application
• Automatic Call Distribution application
• Efficient wireless base station/hub application
4.4.1 PBX to PBX Trunk Application
Figure 4-6 shows the IAD with an ADPCM server used to compress two T1 or E1
PBX-to-PBX trunks into a single trunk. The voice from each PBX is connected via a digital
T1 or E1 connection to the IAD. The voice channels are routed to the ADPCM server, where
each voice channel is compressed to 32 Kbps. The compressed voice is routed to the outbound
T1/E1 link to the other IAD unit, where it is decompressed and placed back into two T1 or E1
trunks to the remote PBX. PBX to PBX trunk lines can be compressed 2:1 to reduce leased
line charges. The application is also valid for analog PBXs and key systems.
Figure 4-6.IAD using ADPCM for PBX to PBX Application
4.5 Router Server Card (8000-Router)
The IPR*4 card provides a PPP or HDLC backbone for customers to extend their
communications, command and control capability in an IMACS network. This card extends
the capability of the IMACS shelf to expand the range of control in the customers private
network. The 883275 card delivers eight high-speed PPP links, while the 883280 card delivers
4 high-speed links and 124 single-full DS0 HDLC channels.
The IPR*4 card introduces to the IMACS platform a synchronous standard implementation of
PPP, RFC 1661. It also provides replacement technology for the MCC card, by the support of
HDLC links to the remote shelves, although fractional DS0’s are not supported.
In order to provide the Ethernet to PPP or HDLC inter-working capability, the IPR*4
10/100BT card has four modular RJ45 interface ports on the faceplate.
The IPR*4 10/100BT Cards are IP routers that route packets based on IP destination
addresses. IPR*4 routes IP datagrams between Ethernet and PPP T1’s, or HDLC framed T1’s.
T1/E1 Carrier
Network
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