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Fax and modem via Drop & Insert card (VWIC 2MFT-E1-DI)

Unanswered Question
Aug 11th, 2003
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Currently installing pair of 2610XM rtrs with Drop & Insert cards (VWIC 2MFT-E1-DI) between them.

At each side there is PABX connected via E1 to Drop&Inser card, and 2Mbs leased line between locations.

Configured 15 CH for data and 15 CH for voice.

Data works fine.

Voice services work fine as well, BUT!!!


- When trying to use analog modems between locations it’s not working

- When trying to send fax between locations, it’s hardly working (i.e. 1/10 success & even then copy is hardly readable).


All problems not present when I bypass routers and 2Mbs leased line with 120Ohm cable.


Any knowledge about similar problems?

Any tip for sorting this kind of problems, or this is “by default” behavior for such setup?


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Anonymous (not verified) Mon, 08/18/2003 - 06:57
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The Drop & Insert function of VWIC-2MFT-E1-DI behaves as a TDM cross-connect, i.e. it switches the digital content of timeslotstransparently between E1 controllers. So it does not matter whether these timeslots carry data, voice or modem connections.Just check E1 links are properly synchronised.


h-fruehwirth Thu, 09/04/2003 - 01:16
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Thanks for tip, sorry for delay in reply (I was on leave).

re synchronization, it is properly synchronized (as you can see in output attached.

All other phone services/functions (standard voice calls, CallBack, CLIP etc.) and data transfer is working fine. If any problems with link sync I suppose there should be some problems with those as well.


!

rtr#sh controller e1 0/0

!

E1 0/0 is up.

Applique type is Channelized E1 - balanced

Description: Connecton to 2Mbs leased line

No alarms detected.

alarm-trigger is not set

Version info Firmware: 20011015, FPGA: 11

Framing is CRC4, Line Code is HDB3, Clock Source is Line.

Data in current interval (530 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 1:

!

! each Interval equals 900 Secs (15 min)

!

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 2:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

! etc, etc. Data in Interval XX:

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