ITEM: D2684L

Having problems setting up remote RANs on 16 port concentrator.

Question:

I have a 530, running 3.2.3, and I am trying to set up remote RANs on
a 128 port adapter.  I am trying to come out of the card straight to a
modem (5822-10 DSU/CSU modem).  I can't seem to get them to talk to
each other. The cable from RISC to the modem is an NE cable, and the
cable I have on the other side is an NF cable.  

Response:

The one of the reasons the 5822-10 will not make the connection is the
pin outs for cables NE and NF do not work for the 5822.  The following
changes need to be made to this cable in order to make it work:
         On the modem end of both cables the following lines 
        must be tied together:
        
                DSR, DTR, RTS -- 6, 20, 4
         Plus, CTS (5) must be left floating.
 In addition Iyad wanted the 4-wire pin out for the JMA (RJ-48) connector
for the 5822 in a short hall modem configuration.  The pin out for this cable
can be one of the two pin outs listed below:
         1 --- 7         1 -- 8
        2 --- 8         2 -- 7
        7 --- 1         7 -- 2
        8 --- 2         8 -- 1  

In addition the units have to be configured for clocking as follows:

        unit 1 - internal clocking
        unit 2 - internal clocking.

Response:

5822-10 CSU/DSU setup (left-rotary:right-rotary)

Primary    Secondary
-------    ---------
  1:2         1:2        (Mode = LDM)
  2:1         2:1        (Link = Pt-to-Pt SA)
  3:1         3:2        (Network Function:  1= Primary, 2 = secondary)
  4:1         4:1        (Antistreaming = Disable)
  5:2         5:2        (Network Services = Disable)
  6:1         6:1        (Test Control = Disable)
  7:2         7:2        (Clocking = Internal)
  8:E         8:E         (data Rate = 56000)
  9:2         9:1         (First Address Digit)
  A:2         A:2         (Second Address Digit)

Pinouts are earlier in item:  

With a breakout box we got an AC with the original NE and NF, by
breaking the signal of pin 5, and jumpering 4 on the modem 
(DCE) side to pin 20 on the computer (DTE) side of the breakout box.

He is curious at what distance he can use the direct wire hookup.

26 gauge wire - 2.6 miles
24 gauge 3.7 miles 56 KB.



Support Line: Having problems setting up remote RANs on 16 port concentrator. ITEM: D2684L

Dated: August 1993 Category: N/A

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