[j-nsp] Question about E1 interfaces in J2300

[Alain Briant]

Hi

Only to access to console port :

There is a console port, Auxiliary port and also USB port on with we can 
connect an Asynchronous modem to have access to the management of the 
router.
On the other hand, Juniper has never developed Asynchronous 
communication on some kind of  "trunk" ports, like PPP, ore some stuff 
like that so to transport IP over an asynchronous line the answer is 
(someone will blame me if I am wrong)  NO.

Regards
Alain BRIANT

Sami Ghourabi a écrit :

>Hi,
>
>Thanks for your helpful replies.
>
>However I didn't get answer for my last question.
>
>Do J Series routers have asynchronous interfaces on which one can connect a
>dialup modem for backup?
>
>Best regards,
>
>Sami.
>
>-----Message d'origine-----
>De : damien holloway [mailto:damien at holloway.id.au] 
>Envoyé : mercredi 12 mars 2008 00:46
>À : Andrew Mulheirn
>Cc : Sami Ghourabi; juniper-nsp at puck.nether.net
>Objet : Re: [j-nsp] Question about E1 interfaces in J2300
>
>serial interfaces as per on a Cisco router.
>
>Be aware that even though the cisco cables fit the serial ports on the
>Juniper they are not compatible, ie do not work...
>
>
>On Wed, Mar 12, 2008 at 12:05 AM, Andrew Mulheirn
><Andrew.Mulheirn at telindus.co.uk> wrote:
>
>
>	Hi Sami -
>	
>	1. Yes, they support G.703 and G.704.
>	
>	2. The dual-port E1 PIM has RJ-48 interfaces.
>	The dual-port channelized E1/T1 has RJ48 as well.
>	The dual-port synchronous serial has high-density serial interfaces
>as per on a Cisco router. For this module you need an external CSU/DSU
>	
>	3. I would have thought that any RJ-48 to BNC balun would work.  It
>needs to change the impedance from 120 ohm to 75 ohm - it doesn't do
>anything to the framing, so the following balun would work:
>	
>	
>http://www.blackbox.co.uk/solutions/display.asp?cs=dvh&id=1&doc=mt242a-m
>	
>	I think that's what we used.  Even though it says it is a G.703
>balun it should do G.704 as well.
>	
>	Cheers,
>	
>	A.
>	
>	________________________________________
>	From: juniper-nsp-bounces at puck.nether.net
>[juniper-nsp-bounces at puck.nether.net] On Behalf Of Sami Ghourabi
>[sami.ghourabi at online-netsecurity.com]
>	Sent: 11 March 2008 15:44
>	To: juniper-nsp at puck.nether.net
>	Subject: [j-nsp] Question about E1 interfaces in J2300
>	
>
>	Hi list,
>	I'm somewhat new to routing and Juniper Networks routers, so please
>tolerate
>	my ignorance.
>	
>	I have some question about the fixed E1 interfaces in J2300 routers.
>	
>	1. These interfaces are fractional interfaces supporting G703 and
>G704
>	protocols, am I right?
>	2. What is the connector type of these interfaces? I know that
>channelized
>	E1 on Juniper have J48-S connectors, but I'am not sure about fixed
>	fractional interfaces connector type for J series.
>	3. Are there E1 dual BNC balanced cables supported by these
>interfaces? As
>	far as I know, Juniper doesn't provide this kind of cables. Did
>anyone used
>	this kind of cables and which brand would are know to be compatible
>with
>	Juniper routers ?
>	
>	Another question not related to E1 interfaces. Do J routers have any
>type of
>	interfaces that can work in synchronous and asynchronous mode, not
>	simultaneously of course.
>	
>	Thanks for your reply.
>	
>	Best regards.
>	
>	Sami.
>	
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