Cisco Cisco Unified MeetingPlace Audio Server 安装指南
Telephony and LAN planning 3-13
February 27, 2004
Cisco MeetingPlace Audio Server Installation Planning Guide
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 (8106)
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.
Shielded cable must be used, and the shield must be electrically terminated at
the rear of the MeetingPlace server. MeetingPlace also supports fractional T1
services and has complete flexibility to activate one or all ports on a span.
the rear of the MeetingPlace server. MeetingPlace also supports fractional T1
services and has complete flexibility to activate one or all ports on a span.
MeetingPlace can use dialed number information to connect the caller directly
to a meeting or to determine the MeetingPlace services to which the caller has
access.
to a meeting or to determine the MeetingPlace services to which the caller has
access.
MeetingPlace can also be configured to support devices where the T1 trunk
does not provide any signaling and is always offhook. This is used in
applications where a Clear Channel connection is required. (For more
information, contact your MeetingPlace support representative.)
does not provide any signaling and is always offhook. This is used in
applications where a Clear Channel connection is required. (For more
information, contact your MeetingPlace support representative.)