dave@ecrc.de (Dave Morton) (11/28/90)
Do Cisco have any plans to provide an ISDN interface for their routers ? This is becoming very attractive here in Germany now that ISDN is coming on stream. It would beat the pants off an X.25 connection at 9.6 baud which at the moment costs an arm and a leg..... Apologies if this has been discussed already - I don't read the group regularly. Dave Morton, European Computer Research Centre Tel. + (49) 89-92699-139 Arabellastr 17, 8000 Munich 81. Germany. Fax. + (49) 89-92699-170 E-mail: dave@ecrc.de
ccwacker@cnedcu51.bitnet (11/29/90)
In article <2241@ecrc.de>, dave@ecrc.de (Dave Morton) writes: > Do Cisco have any plans to provide an ISDN interface for their routers ? > This is becoming very attractive here in Germany now that ISDN is coming > on stream. It would beat the pants off an X.25 connection at 9.6 baud > which at the moment costs an arm and a leg..... > Apologies if this has been discussed already - I don't read the group > regularly. At last European european cisco meeting in Nice, cisco people have asked if there is interest in such an interface. User responses were positive, especially for using ISDN as backup. But only 3-4 guys were interested to use cisco to interconnect LANs using only ISDN. I think that cisco will not provide an interface for the basic ISDN access (2x64 kbps + D), but will perhaps provide an interface for the primary ISDN access (30x64 kbps + D). With such an interface, connexion to multiple sites can be done simultaneously, or even you can dynamically adjust the number of channels with the trafic volume. We have just started to test LANs connexion with ISDN using cisco routers here at our university. Instead of using an interface in the cisco box, we use an external ISDN adapter (ISDN <> V35). It seem's to work fine till yet. For the moment we start and stop the connexion manually, but we hope to find some way to provide automatic dialing in a near future. Happy ISDNing. Claude Wacker Network Manager, University of Neuchatel, Switzerland CCWACKER@CNEDCU51.Bitnet
haas%basset.utah.edu@cs.utah.edu (Walt Haas) (11/30/90)
In article <2241@ecrc.de>, dave@ecrc.de (Dave Morton) writes: > Do Cisco have any plans to provide an ISDN interface for their routers ? The University of Utah expects to be on an exchange supporting ISDN in roughly one year. To prepare for that insurmountable opportunity :-) we expect to install a few ISDN lines remotely from another exchange. This raises the issue of what connectivity we can support. Ideally I would like to have people with machines at home (Mac/PC/Sun etc.) able to open a 64k channel into the University and run in client/server mode or something similar. I would envision a box that ultimately works like this: ----------- ------------ ISDN primary ============| box |-----------| AGS+ |------- Ethernet ----------- ------------ such that a user running, say, Novell or NFS or an X window at home could make the appropriate connection to a corresponding machine at the University. Does cisco have plans for such a box? Thanks -- Walt Haas haas@ski.utah.edu
pte900@jatz.aarnet.edu.au (Peter Elford) (12/03/90)
|> In article <2241@ecrc.de>, dave@ecrc.de (Dave Morton) writes: |> Do Cisco have any plans to provide an ISDN interface for their routers ? AARNet is about to upgrade the backbone links in our network to ISDN primary rate services. These links will look like this: V.35 G.703 PRA cisco ------ Nx64K Mux ------- ISDN Adapter ----- ISDN Network --- etc. The Nx64K Mux is made by Summit Technologies (an Australian company) and provides a single bitstream out of multiple 64K B channels. For a link of N 64K streams you need one additional B to do the synchronising (so 128K requires 3 64K circuits). The ISDN adapter is from Jtec (another Australian company). Within about 3-6 months the Summit box will have a PRA interface, and Jtec will be offering Nx64K out of their equipment, so we will only need an interface box from one vendor. In addition, we are planing to migrate our 48K tail links to ISDN BRA links (2B+D) and are looking at terminal adpaters that will provide V.35 interfaces to this service (there are at least two vendors of such equipment in Australia: Telecom Australia resell the Phillips box, and Datacraft sell the Newbridge). Down the track a bit we would like to consider dynamic ISDN links (placed by the router and/or Summit/Jtec box) to bridge link failures or to add additional capacity (ie. link bandwidth) on demand. This would require some support from both cisco and Summit/Jtec ... Peter Elford, e-mail: P.Elford@aarnet.edu.au Network Co-ordinator, phone: +61 6 249 3542 Australian Academic Research Network, fax: +61 6 247 3425 c/o, Computer Services Centre, post: PO Box 4 Australian National University Canberra 2601 Canberra, AUSTRALIA
sterba@margaux.inria.fr (Milan Sterba) (12/07/90)
Distri
sterba@inria.inria.fr (Milan Sterba) (12/08/90)
We (INRIA Rocquencourt, the CEDIA Passerelles project group, lead by
Yves Devillers) cooperate with cisco on some ISDN - cisco attachment
solution. For that purpose we use the MATRA Terminal adaptators S0/V24.
This adaptators have one S0 port and two V24 ports. One of the V24 ports
is used as auxiliary for configuration and dial-up purposes. The second
one can be used in various configurable fashions. To attach a cisco box
to it we configure it as a synchronous 64 K port. The aim is to utilize
the full capacity of a ISDN/B channel for cisco-to-cisco communication.
------------------
-------- | |
| | V/24 ---(aux-port)---|cisco aux-port |
+- S0 |Matra TA| | |
| | | V/24 -{"B-channel"}--|cisco serial port |
| -------- | |
| ------------------
ISDN network
| ------------------
| -------- | |
| | | V/24 ---(aux-port)---|cisco aux-port |
+- S0 |Matra TA| | |
| | V/24 -{"B-channel"}--|cisco serial port |
-------- | |
------------------
This solution makes it possible to interconnect two cisco boxes using
the ISDN B-channel (64 kbit) using either hdlc, lapb or x25 encapsulation.
The dialing can be made in two fashions. The first consists in using
the auxiliary port (b-port) of the cisco box connected to the auxiliary
port of the Matra adaptator to dial using Hayes or V25bis mode (both
supported by the Matra box). You can access the b-port by telnet-ing
the port 2001 of the cisco.
The second solution uses the 108/2 mode for dialing. In this latter
case the Matra box dials-up a preconfigured ISDN number when the DTR
signal goes up on the main V24 (64 kbit/s) interface. The control of
the DTR is possible using the "[no] shutdown" command in the cisco
configuration mode.
-----------------
We even have experimented with the ISDN board supplied by Sony for
their NEWS work stations (we have got one from Sony for beta-tests).
The Sony ISDN equipment can be IP-interconnected with the above cisco
ISDN solution using lapb-dce encapsulation.
--
--Milan Sterba-- (INRIA Rocquencourt)
sterba@inria.fr