Zhone IMACS 8000, User Manual

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Reference Guide 4-11
Applications Data Modules and Applications
Since an SRU port does not require a complete 64Kbps time slot, the Sub-Rate card allows
you to multiplex a number of devices into a single, subdivided time slot on a WAN card. SRU
card ports can also be multiplexed with voice traffic on an ADPCM engine.
Each RS-232 port can be independently programmed for synchronous (including HDLC) or
asynchronous operation. Synchronous operation is available at speeds of 2.4 Kbps up to 38.4
Kbps while for asynchronous the range is 300 bps up to 38.4 Kbps. Each synchronous port can
receive timing from either the DTE device or the system clock.
If the DTE supplies the transmit clocking, it must be synchronized with the system clocking
source. For each asynchronous data port, the stop bits, data bits and parity are user
configurable. The SRU incorporates a built-in V.14 Async-to-sync converter to avoid
over-sampling and consequently saves bandwidth. Asynchronous data circuits are converted
to synchronous mode by the SRU card prior to multiplexing onto a WAN aggregate.
Subrate data ports are multiplexed into industry standard DSO formats. The user may specify
the format of the DSO that the data port is assigned to. The choices are: (1) DSO-A which
allows only one data port to be mapped into the DSO and (2) DSO-B which allows multiple
data ports from multiple SRU cards in the system to be mapped into the same DSO time slot.
If the DSO-B format is selected, then the user can specify the type of DSO-B format required
(b-5 only is offered) and the sub-rate position that the data port will occupy within the DSO-B
frame.
In b-5 mode, the DSO is divided into five sub-rate positions, each of which are occupied by a
data port operating at 9.6 Kbps, 4.8 Kbps, or 2.4 Kbps. Additionally, one or two 19.2 Kbps
circuits are supported in b-5 mode. Each would occupy two of the five sub-rate positions.
Additionally, data circuits running at 28.8 Kbps or 38.4 Kbps are supported in b-5 mode and
will occupy three or four of the five available sub-rate positions.
In the application shown in Figure 4-5, the IAD with the SRU card (on the right hand side)
can either send each sub-rate on a separate DS0 (DSO-A format) or groom multiple subrate
channels into a single DS0 (one of the DSO-B formats).
Figure 4-5.IAD with SRU Card Application
CAUTION:
For contin ued
protecti on a
gain st fire ,
replace onl
y with the sa me
type and
rating of fuse
Premisy
s Comm unicatio
ns, Inc.
Model IMA
CS/600
T 5A 250V IEC
Fuse 5A SB
250V UL/C SA
24/48V 5 A
LIS TED 9K09
LR 77
063
120-200-24
0V ~
3A, 50 /
60 Hz
Telephone
Equi pme nt
Class 2 Po wer
Sour ce
®
® UL
+ -
+ - + -
R
G
R
C
O
M
VN VB VA
HSU -T 530/35 S 60
HSU-
T
530/ 35 S 60 HSU- T 530/3 5
S 60 HSU-T 530 /35 S 60
HSU-T 530 /35 S 6 0 HSU- T
530/35 S 60 BRI
HSU
530/35 S 6 0
P
2
P
1
P 4
P
3
FXO 813 9
N
O
D E
T E
R
M
C O
M
P
P
1
P
1
CPU
CLO CK
NVR AM
W1-1
CSU
W1-2
DSX
WA N
IF T1+DS 1
IAD w/SRU
T1 Carrier Network
CAUTION: For con
tinu ed
protecti on a gainst fire
,
replace on ly with the
same
type an d rati
ng of fuse
Premisys Comm
unica tions , Inc.
Model IMA CS/600
T 5A 250V
IEC
Fuse
5A SB 250V UL/CSA
24/48
V 5A
LIS TED 9
K09
LR 77 063 120-200- 240V
~
3A, 50 / 60 Hz
Telephone
Equipment
Class 2 P ower So urce
®
®
UL
+ - + -
+ -
R
G
R
C
O
M
VN
VB VA
HSU-T 530/3 5 S 60
HSU -T 530/35 S 60
HSU
-T
530 /35 S 6 0 HSU -T 530 /35
S 60 HSU-T 530/35 S 60
HSU-T 530/ 35 S 60 BRI
HSU
530/ 35
S 60
P
2
P 1
P
4
P
3
FXO 8139
N
O
D
E T
E
R M
C
O M
P
P 1
P
1
CPU
CLOC K NVR AM
W1-1
CSU
W1-2
DSX
WAN IF
T1+
DS1
IAD
OCU-DP
RS232
Synchronous/Asynchronous
DTE (300 bps - 38.4 Kbps)
v.35
CSU/DSU Local DTE
Remote DTE