General DataComm SpectraComm SDT, Инструкция по установке и эксплуатации

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Introduction & Specifications SC-SDT Applications Overview
076R174-000 SpectraComm SDT 1-7
Issue 4 Installation and Operation Manual
A Transport Applications
The synchronous transport application of the SC-SDT links equipment together over the customer's
IP network. The SC-SDT encapsulates the packetized, HDLC-based sync traffic and forwards the
data over Ethernet using TCP/IP. The sync data at any local SC-SDT port can be forwarded to any
sync port at any remote SC-SDT location.
Each SC-SDT front panel connector allows connection with up to three local synchronous customer
equipment ports. For higher density requirements, simply add more SC-SDT devices to the ethernet
segment at each site. When the user connects the “smart” serial cable, SC-SDT will auto-configure
the interface settings (e.g., V.35 or RS232) and the device type (DTE or DCE). A DTE-type port
will receive clocking from the local equipment. A DCE-type port will provide clocking to the local
equipment.
Figure 1-3 shows multiple sites with sync equipment linked together over the customer's IP network
via SC-SDT. Any DTE/DCE at any SC-SDT site can exchange sync traffic with any other DTE/
DCE.
Note
The SC-SDT device is required at both ends of a link to support the proprietary encapsulation scheme.
Figure 1-3 Synchronous Data Transport in a Typical IP Network
ROUTER
or SCIP
ROUTER
or SCIP
General
DataComm
General
DataComm
ROUTER
or SCIP
General
DataComm
Sync equipment at all SC-SDT sites can
exchange data across the IP network.
SC-SDT SITE 'C'
SC-SDT SITE 'B'
SC-SDT SITE 'A'
S
Y
N
C
TR
AN
SP
OR
T
O
VE
R
IP
N
ET
W
OR
K
Port 1 Sync
POR
T 1 INS
POR
T1
POR
T2
POR
T 2
SC SDT POR
T 3
ON
POR
T3
AL TM ET
DTE/DCE
DTE/DCE
DTE/DCE
POR
T 1
INS
POR
T 1
POR
T 2
POR
T 2
SC SDT POR
T 3
ON
POR
T 3
AL TM ET
Port 3 Sync
Port 2 Sync
DTE/DCE
DTE/DCE
DTE/DCE
POR
T 1
INS
POR
T1
POR
T2
POR
T 2
SC SDT
POR
T 3
ON
POR
T3
AL TM ET
Port 3 Sync
Port 2 Sync
DTE/DCE
DTE/DCE
DTE/DCE
Port 1 Sync