Zhone Technologies Network Device Manuel D’Utilisation
Zhone Technologies, Inc.
IMACS Product Book, Version 4
March 2001
Page 109
L o c a l
D T E
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H S U
H S U
C r o s s - C o n n e c t
E l e m e n t
E l e m e n t
T 1
T 1 F
a c i l i t y
D D S F a c i l i t y
D S U / C S U
R e m o t e
D T E
D T E
C r o s s - C o n n e c t
E l e m e n t
E l e m e n t
T 1
O C U
/ D P
/ D P
Figure 7
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V . 3 5
L o c a l
D T E
V . 3 5
H S U
H S U
C r o s s - C o n n e c t
E l e m e n t
E l e m e n t
T 1
T 1 F
a c i l i t y
D D S F a c i l i t y
D S U / C S U
R e m o t e
D T E
D T E
C r o s s - C o n n e c t
E l e m e n t
E l e m e n t
T 1
O C U
/ D P
/ D P
Figure 5
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V . 3 5
L o c a l
D T E
D T E
V . 3 5
H S U
H S U
C r o s s - C o n n e c t
E l e m e n t
E l e m e n t
T 1
T 1 F
a c i l i t y
D D S F a c i l i t y
D S U / C S U
R e m o t e
D T E
D T E
C r o s s - C o n n e c t
E l e m e n t
E l e m e n t
T 1
O C U
/ D P
/ D P
Figure 6
V . 3 5
V . 3 5
L o c a l
D T E
D T E
V . 3 5
H S U
H S U
C r o s s - C o n n e c t
E l e m e n t
E l e m e n t
T 1
T 1 F
a c i l i t y
D D S F a c i l i t y
D S U / C S U
R e m o t e
D T E
D T E
C r o s s - C o n n e c t
E l e m e n t
E l e m e n t
T 1
O C U
/ D P
/ D P
Figure 8
V . 3 5
V . 3 5
L o c a l
D T E
V . 3 5
H S U
H S U
C r o s s - C o n n e c t
E l e m e n t
E l e m e n t
T 1
T 1 F
a c i l i t y
D D S F a c i l i t y
D S U / C S U
R e m o t e
D T E
D T E
C r o s s - C o n n e c t
E l e m e n t
E l e m e n t
T 1
O C U
/ D P
/ D P
Figure 9
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V . 3 5
Figure 44b - Built-In Diagnostics Example
IMACS Performance Monitoring
The IMACS provides non-intrusive performance monitoring of T1 lines and DDS circuits that terminate on OCU-
DP cards. This capability is built into the system software and does not require any special options or expensive
external equipment.
The IMACS provides non-intrusive performance monitoring of T1 lines and DDS circuits that terminate on OCU-
DP cards. This capability is built into the system software and does not require any special options or expensive
external equipment.
T1 Line Performance Monitoring
Performance monitoring, statistics gathering and performance reporting of T1 facilities is supported in the IMACS.
In ESF format, CRC errors, Out-Of-Frame errors, and Controlled Slips are combined to provide line quality and
performance statistics in accordance with industry standards. In D4 format, Bipolar Violations (BPVs) are used
instead of CRC errors. The performance statistics are gathered and displayed in fifteen-minute intervals for the
preceding twenty-four hours. They include Errored Seconds, Unavailable Seconds, Severely Errored Seconds,
Bursty Errored Seconds, Loss Of Frame Count, and Slipped Seconds.
Performance monitoring, statistics gathering and performance reporting of T1 facilities is supported in the IMACS.
In ESF format, CRC errors, Out-Of-Frame errors, and Controlled Slips are combined to provide line quality and
performance statistics in accordance with industry standards. In D4 format, Bipolar Violations (BPVs) are used
instead of CRC errors. The performance statistics are gathered and displayed in fifteen-minute intervals for the
preceding twenty-four hours. They include Errored Seconds, Unavailable Seconds, Severely Errored Seconds,
Bursty Errored Seconds, Loss Of Frame Count, and Slipped Seconds.
In ESF mode, these statistics are available to the system operator as well as to the carrier or service provider over the
embedded 4 Kbps Facilities Data Link (FDL). Each ESF T1 facility can be independently programmed to support
framing according to the AT&T 54016 standard or the ANSI T1.403 standard or both simultaneously. Additionally,
embedded 4 Kbps Facilities Data Link (FDL). Each ESF T1 facility can be independently programmed to support
framing according to the AT&T 54016 standard or the ANSI T1.403 standard or both simultaneously. Additionally,