[j-nsp] Question about E1 interfaces in J2300

[Andrew Mulheirn]

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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