Cisco Cisco Unified MeetingPlace Audio Server 安装指南
3-6 Telephony and LAN planning
Cisco MeetingPlace Audio Server Installation Planning Guide
February 27, 2004
Attaching to the telephone network (8112)
The MeetingPlace digital T1 Smart Blades provide direct connectivity to a
PBX or the telephone network. Connection to the telephone network is
through a Channel Service Unit. MeetingPlace's Multi Access Blades provide
connectivity with IP Voice networks. MeetingPlace also supports different
trunk signaling types.
PBX or the telephone network. Connection to the telephone network is
through a Channel Service Unit. MeetingPlace's Multi Access Blades provide
connectivity with IP Voice networks. MeetingPlace also supports different
trunk signaling types.
This section describes the information you need to order your trunk lines.
Before you start, check your MeetingPlace order schedule to find out how
many access ports (user licenses) your company ordered. The MeetingPlace
8112 system supports up to 1152 PSTN access ports or 960 IP access ports.
You may also configure your system for a combination of both PSTN and IP,
but the overall number of access ports supported is less than 1152.
Before you start, check your MeetingPlace order schedule to find out how
many access ports (user licenses) your company ordered. The MeetingPlace
8112 system supports up to 1152 PSTN access ports or 960 IP access ports.
You may also configure your system for a combination of both PSTN and IP,
but the overall number of access ports supported is less than 1152.
WARNING
Supplemental earth grounding is required at all times. This
supplemental grounding consists of a grounding cable attached to
supplemental ground lugs on the back of the MeetingPlace server chassis and
is permanently connected to an earth ground point at the other end via an
appropriate facilities grounding terminal. The ground lugs consist of two
#10 screws. To attach to these, crimp a #10 ring lug onto the ground
conductor being used. Additionally, all the power outlets in the vicinity of the
MeetingPlace system must be of the grounding type and they must be
properly grounded.
supplemental ground lugs on the back of the MeetingPlace server chassis and
is permanently connected to an earth ground point at the other end via an
appropriate facilities grounding terminal. The ground lugs consist of two
#10 screws. To attach to these, crimp a #10 ring lug onto the ground
conductor being used. Additionally, all the power outlets in the vicinity of the
MeetingPlace system must be of the grounding type and they must be
properly grounded.
T1 digital trunking requirements (8112)
T1 Smart Blades support digital connections to a PBX system or to a PSTN.
The framing for the digital lines can be one of the following:
The framing for the digital lines can be one of the following:
•
Extended superframe (ESF)
•
D4
The digital lines can use either B8ZS coding or jammed bit.
The following are the supported protocols for T1 digital trunks:
•
T1 CAS Systems: E&M wink start, ground or loop
•
T1 PRI Systems: AT&T (TR41459), Bellcore (NI-2), Nortel (DMS-100)
N
OTES
•
ESF framing and B8ZS coding are strongly recommended. Using
D4 framing or jammed bit coding may produce unsatisfactory service.
D4 framing or jammed bit coding may produce unsatisfactory service.
•
End-to-end positive disconnect supervision is essential. Without it,
MeetingPlace cannot reliably tell when a caller hangs up, with various
undesirable results. Many PBX and central office systems can provide
disconnect signaling
MeetingPlace cannot reliably tell when a caller hangs up, with various
undesirable results. Many PBX and central office systems can provide
disconnect signaling
E&M Wink Start lines are recommended because
they provide for positive answer and disconnect supervision. However,
because in many cases the person taking an order for lines will not
understand the term, you will need to escalate the request to someone with
a more technical background.
because in many cases the person taking an order for lines will not
understand the term, you will need to escalate the request to someone with
a more technical background.