Cisco Cisco Unified MeetingPlace Audio Server Installation Guide
Cisco MeetingServer 5.1 Installation Planning Guide
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Cisco Systems
March 2003
T1 T1 T1 T1 T1 T1
SB SB IP IP IP IP 192
576
768
T1 T1 T1 T1 SB SB
SB IP IP IP IP IP 240
384
624
T1 T1 T1 SB SB SB
IP IP IP IP IP IP 288
288
576
T1 SB SB SB SB IP
IP IP IP IP IP IP 336
96
432
Figure 3-4 Mixed Configuration Examples
4
T1 Digital Trunking Requirements
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.
Notes:
•
•
ESF framing and B8ZS coding are strongly recommended. Using
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 a variety
of undesirable results. Many PBX and central office systems can provide
disconnect signaling
of 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, in
many cases the person taking an order for lines will not understand the
term and it will be necessary to escalate the request to someone with a
more technical background.
many cases the person taking an order for lines will not understand the
term and it will be necessary to escalate the request to someone with a
more technical background.
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.
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.
onto the ground conductor being used.
Additionally, all of the power outlets in the vicinity of the MeetingPlace system must
be of the grounding type and they must be properly grounded.
be of the grounding type and they must be properly grounded.
4
The T1 trunks may or may not be enabled depending upon the number of IP Access Blades populated.