Zhone IMACS Software FAQ 2
16. How many timeslots can be terminated onto User Cards?
The answer is not a simple one, as not all User Cards are created alike nor are all CPUs. The following explanation will help you to configure solutions that follow the rules.
There are four user card buses, the A, B, C & D buses. Each bus carries 32 64K timeslots of traffic to and from User Cards. Two timeslots on the A bus are used for intra-unit signaling and are not available for User Card traffic.
The 8800 Bus Connect CPU (non-redundant) can access only the A & B User buses. Therefore, the maximum bandwidth available to User Cards when using the 8800 CPU is:
(2 * 32) - 2 timeslots = 62 timeslots
The 8804 Bus Connect CPU/Redundant Capable can access all four buses, but there are limitations on which user buses can be connected to which WAN cards. In Bus Connect (8800 or 8804 CPU) systems, the WAN card in slot W1 is "connected" to user buses A & B. In Bus Connect Systems using the 8804 and having a second active WAN card, the WAN card in slot W3 is "connected" to user buses C & D.
Now, why do we care which user buses connect to which WAN cards? Remember, we said that all User Cards were not the same? Well, some User Cards have the capability to place traffic onto user buses A & B only. The list below shows which cards are limited to A & B bus only.
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8-port, 2 wire E&M/TO
|
8108
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4-port, 4 wire E&M/TO
|
8115
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8-port, 4 wire E&M/TO
|
8119
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4-port, 2 wire FXS/FXSDN/PLAR/DPO-900 Ohm
|
8124
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4-port, 2 wire FXS/FXSDN/PLAR/DPO-600 Ohm
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8125
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8-port, 2 wire FXS/FXSDN/PLAR/DPO-900 Ohm
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8128
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8-port, 2 wire FXS/FXSDN/PLAR/DPO-600 Ohm
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8129
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4-port, 2 wire FXO/FXODN/MRD/DPT-900 Ohm
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8134
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4-port, 2 wire FXO/FXODN/MRD/DPT-600 Ohm
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8135
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8-port, 2 wire FXO/FXODN/MRD/DPT-900 Ohm
|
8138
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8-port, 2 wire FXO/FXODN/MRD/DPT-600 Ohm
|
8139
|
|
2-port, V.35 super-rate data
|
8212
|
|
10-port, RS232C sync/async sub-rate data
|
8220
|
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8-port, sub-rate B7R IP Concentrator Card
|
8228
|
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8-port, sub-rate FRAD
|
8230
|
|
5-port, OCU-DP (explandable)
|
8247
|
|
4-port, OCU-DP child card for 8247
|
845
|
Note that all voice cards are limited to A & B buses only. That is why IMACS supports only 62 voice channels. In addition, there are some data cars in the above list, which are A & B bus only cards. In no case can the total number of timeslots routed to these cards exceed 62 timeslots. Additionally, when used with the 8804 CPU, ports on those cards can be routed only to the first active Wan (W1).
In Cross Connect Systems (8801 or 8802 CPUs), user buses are not permanently "connected" to WAN cards, therefore any user card can be routed to any WAN card. The restrictions with Cross Connect Systems for bandwidth to user cards are: 1) the total bandwidth to all user cards cannot exceed 126 timeslots, and 2) the total bandwidth to all user cards listed in Table 1 cannot exceed 62 timeslots.
17. Will the IMACS support 3rd party SNMP EMS systems?
Zhone publishes the IMACS MIBS along with a description of the traps via our GSS web site. These files are in PC text format. The MIBS are provides free of charge and without consultation services with the understanding that the information may be used to provide a reference point for any third party format and using the traps to report alarms in human readable format and using SNMP GET command to collect performance data and parameter values as defined by the MIB.
Zhone makes continuous efforts to ensure that the published MIBS are syntactically correct. However, it is not possible to satisfy the nuances of all the MIB compilers that are available. Zhone uses the SNMPc v4.0 product available from CastleRock Computing and HP OpenView for PC to verify compliance. If other compilers are used it may be necessary to edit the MIBS text files.
Zhone advises any partner and customer wishing to extensively control and manage the IMACS products to consider using our OnLine EMS product which has the necessary information model built into the software. This information model ensures that any SNMP changes made to the IMACS are checked for accuracy before being sent to the device.
18. How many compression rates can ADPCM provide?
ADPCM in IMACS provides 3 compression rates.
24kpbs provides 3.6-3.8 MOS (Mean Opinion Score) voice quality
32kbps provides 4.0-4.3 MOS
40kpbs provides 4.0-4.3 MOS
19. How can I calculate the IMACS SRU subrate?
Two important facts we need to keep in mind about SRU.
1. The total bandwidth of SRU is 115.2 kbps.
2. There are 2 basic types of sub-rate format, DS0A (a) and DS0B (b).
DS0A occupies one entire WAN time slot, one 64K DS0; b-5 means up to 5 subrate time slots per one WAN TS, b-10 means up to 10 subrate time slots per one WAN TS; b-20 means up to 20 subrate.
Here is the sample configuration for 3 28.8 users.
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1
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2
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3
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|
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STATE
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actv
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actv
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actv
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actv
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WAN/SRV
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w1-1
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w1-1
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w1-2
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|
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TS
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n/a
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n/a
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n/a
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|
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Frame
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b-5
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b-5
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a/b-5
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|
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RATE
|
28.8
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28.8
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28.8
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|
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SR TS
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01
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02
|
01
|
|
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INTF
|
async
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async
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async
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|
20. How do I configure FXO for Wink Immediate Start?
If 5E/DMS switch incoming wink immediate, in FXO menu, configure
mode dpt
signal dpt
If DTMF phone, set Wink and Wink Delay as below.
If rotary phone, set Wink and Wink Delay as below.
21. Does the IMACS BRI card support BERT testing features?
Yes, you can run end-to-end BERT tests by selecting the BRI Card from the Main Menu, press 't' for test. Then set BERT to the desired test pattern. A few of the options are mark, space, 1:1 and 1:7
Here is a screen capture of a successful end-to-end BERT on BRI Port 1. Notice that BERT is set to mark and that the SYNC status displays 'yes' indicating that the port is receiving and sending the mark test pattern properly end to end.
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1
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2
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3
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4
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5
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6
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7
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8
|
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BERT
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mark
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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DIR
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ta
|
ta
|
ta
|
ta
|
ta
|
ta
|
ta
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ta
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CHAN
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B1
|
B1
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B1
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B1
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B1
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B1
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B1
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B1
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SYNC
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no
|
no
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no
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no
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no
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no
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no
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no
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BE
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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|
ES
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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SES
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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|
CSES
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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|
OSS
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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|
BER
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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ELAP
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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|
L1-ST
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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|
LB ST
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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SEAL
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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*****
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22. Can I put a local loop back on the E1 CEPT WAN Card?
Yes, while turning up an E1 circuit, wiring and pin-outs may need to be verified due to Red Alarms or any type of carrier group alarm on the IMACS. In the case below the E1 wiring may have been completed and the carrier may claim that the E1 circuit has been turned up. But W1-1 CEPT is showing a Red Alarm:
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|
CEPT
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|
CEPT
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CGA_RED
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W1-1
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STATE
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actv
|
STATE
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stdby
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NOS
|
W1-1
|
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MODE
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xcon
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MODE
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xcon
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|
|
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FRAME
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crc
|
FRAME
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crc
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|
|
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TS16
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cas
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TS16
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cas
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|
|
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EVEN BIT
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norm
|
EVEN BIT
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norm
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|
|
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AIS/ALM
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none
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AIS/ALM
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none
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|
|
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LINE LB
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off
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LINE LB
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off
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|
|
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LOCAL LB
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off
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LOCAL LB
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off
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|
|
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CH LB
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off
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CH LB
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off
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|
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LB ADDR
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01
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LB ADDR
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01
|
|
|
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LB GEN
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off
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LB GEN
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off
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|
|
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COM/NMS RP
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none
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COM/NMS RP
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none
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|
|
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EER THRHD
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10e-4
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EER THRHD
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10e-4
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|
|
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RDNT RULES
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none
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RDNT RULES
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none
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|
|
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GROUP
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none
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GROUP
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none
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|
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Notice above that CEPT Port W1-1 is in a Red Alarm which indicated that we are not receiving framing or any valid signaling. To verify that there is not a problem with the IMACS channel bank put a local loop back up by hitting the arrow key down to the LOCAL LB parameter, hit enter, set the parameter to 'yes', hit enter, then press 's' to save the change.
Now the local loop back is turned on. Notice in the screen capture below that there are no carrier group alarms displayed on the right hand side of the terminal screen. The Red Alarm has cleared on CEPT Port W1-1. This indicates that the local loop back on W1-1 CEPT port works and that the card is working properly. Also note that on W1-1 CEPT that the parameter LOCAL LB is turned on so the transmit pair is being looped back to the receive pair.
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|
CEPT
|
|
CEPT
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STATE
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actv
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STATE
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stdby
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MODE
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xcon
|
MODE
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xcon
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FRAME
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crc
|
FRAME
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crc
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TS16
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cas
|
TS16
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cas
|
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EVEN BIT
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norm
|
EVEN BIT
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norm
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AIS/ALM
|
none
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AIS/ALM
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none
|
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LINE LB
|
on
|
LINE LB
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off
|
|
LOCAL LB
|
off
|
LOCAL LB
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off
|
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CH LB
|
off
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CH LB
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off
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LB ADDR
|
01
|
LB ADDR
|
01
|
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LB GEN
|
off
|
LB GEN
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off
|
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COM/NMS RP
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none
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COM/NMS RP
|
none
|
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EER THRHD
|
10e-4
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EER THRHD
|
10e-4
|
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RDNT RULES
|
none
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RDNT RULES
|
none
|
|
GROUP
|
none
|
GROUP
|
none
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23. How do I check for framing errors and slips on the E1 CEPT IMACS Card?
From the Main Menu arrow down to the 'CEPT + CEPT' card, hit enter, highlight the CEPT E1 port in question, hit 'p' to access the performance statistics. You will see something similar to below: Unit 1 PERFORMANCE.
USER REGISTERS Sec. 098 of 900
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|
ES
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UAS
|
SES
|
BES
|
LOFC
|
SLIP
|
DM
|
STATUS
|
|
CUR
|
0
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98
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0
|
0
|
0
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0
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2
|
. N . . . . .
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|
01
|
0
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900
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0
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0
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0
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0
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15
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. N . . . . .
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|
02
|
0
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900
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0
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0
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0
|
0
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15
|
. N . . . . .
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|
03
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4
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119
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4
|
0
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2
|
0
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3
|
YNT . . B .
|
|
04
|
0
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0
|
0
|
0
|
0
|
0
|
0
|
. . . . . . .
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|
05
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
. . . . . . .
|
|
06
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
. . . . . . .
|
|
07
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
. . . . . . .
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|
08
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
. . . . . . .
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|
09
|
0
|
32
|
0
|
0
|
1
|
0
|
1
|
YNT . . B .
|
|
10
|
-----
|
-----
|
-----
|
-----
|
-----
|
-----
|
-----
|
. . . . . . .
|
|
11
|
-----
|
-----
|
-----
|
-----
|
-----
|
-----
|
-----
|
. . . . . . .
|
|
12
|
-----
|
-----
|
-----
|
-----
|
-----
|
-----
|
-----
|
. . . . . . .
|
|
TOTAL
|
4
|
1951
|
4
|
0
|
3
|
0
|
34
|
YNT . . B .
|
STATUS: Y=YEL N=NOS T=Test L=LOS O=OOS B=BPV E=ERR
Notice in the above screen capture that the CEPT E1 port is in bad shape since all of the registers are not clean (all of the registers are not '0'). Remember to hit 'r' to refresh/update the statistics. To clear the registers type 'c' and 'y' to verify the clearing. Look closely at the 'Cur' (Current period) row and look for Errored Seconds, Unavailable Seconds, Severely Errored Seconds, etc. If the registers increment then you are looking at clocking issues, bad wiring or cable pairs, bad carrier equipment or some other undesirable condition in the carrier's network. To test your CEPT port see the FAQ "Local Loop Backs on the CEPT E1 IMACS Card".
24. How can I access Serial # information for a particular IMACS card through the terminal interface?
In this example we are going to access the Serial # information for a CPU Card. From the Main Menu arrow down to the CPU card. Do not hit enter since this will take you to the CPU Card's parameter screen. Hit 'e' and you will see a screen similar to:
|
IMACS1
|
|
|
|
|
|
|
|
|
07-14-00
|
12:24
|
|
Slot C1
|
Model
|
8803
|
CPU
|
XCON
|
|
|
|
Serial
|
04982
|
|
|
|
6cff
|
8803
|
4200
|
0000
|
0000
|
0000
|
0000
|
0000
|
|
|
|
|
fe04
|
0763
|
0002
|
0000
|
0000
|
0000
|
0000
|
0000
|
|
|
Above you can see that the Serial # is located on the right hand side of the screen. After you are done viewing the information type 'm' which will take you back out to the Main Menu.
25. Can you interchange CPU cards between and IMACS 600, 800, and 900?
Yes, however you will need to re-register the CPU card.
26. Can I remotely communicate with an IMACS using IP without an IPR, FRS, or B7R card?
Yes, IP can be configured on the CPU card and connected to via a nailed DS0 or ESF/FDL.
27. What features does the Foreign Exchange-Station (FXSC) Coin Voice Card support?
The FXS Coin Card can support FXS, Private Line Automatic Ringdown (PLAR), Foreign Exchange Station-Defined Network (FXSDN), Dial-Pulse Originating (DPO), and Wink-start operations. The FXS Coin Card also supports the voice-compression features of an ADPCM card.
28. I can't get the arrow keys to work on my IMACS with Windows 2000 Hyperterminal. It worked fine with Win95/88, and NT 4.0. What am I doing wrong?
Nothing, Microsoft has released a version of Hyperterminal that no longer supports arrow key usage. To resolve this issue, you will have to either upgrade Hyperterminal, or use another console program. There is no way to configure the version of Hyperterminal delivered with Windows 2000 to offer the arrow key functionality.
29. Does the 8871 ADPCM Card Version/Revision display properly?
The hardware revision and firmware version of 8871 ADPCM server cards may not display correctly in an IMACS when viewed from the management console.
Cards with F/W version 1.36 will display version 0.2. This condition is caused by the CPU Host F/W and is present in all Host F/W levels that currently support the ADPCM. It will be corrected in a future Host F/W release.
Additionally, it has been observed that the ADPCM hardware revision number may display as Revision A1 when in fact it has been designated and labeled as A2 by Zhone. This situation is caused by a card revision discrepancy between the ADPCM card manufacturer and Zhone. Corrective action has been identified and Zhone is working with the supplier to correct the disparity.
30. How do I setup the E&M Card for a Tandem Trunk "Back to Back" application?
The figure below depicts a tandem E&M circuit application where the customer requires E&M circuits to be tied "back to back". The application shown is for type 1 signaling. The card in Mux 1 is configured for Normal E&M mode, the card in Mux 2 is configured for Trunk mode. The T, R, T1, R1 and E&M leads are crossed as depicted in the drawing.
E&M Card Switch Settings:
Normal E&M Mode (Mux 1)
|
S1-INT
|
S2-GND
|
S3-GND
|
S4-All Switches OFF
|
|
Trunk mode (Mux 2)
|
S1-INT
|
S2-BAT
|
S3-BAT
|
S4-All Switches ON
|
|
|
