Mailing List Archive

synchronisation
what is the type of synchronisation in CISCO devices,
Time synchronisationo or Frequency synchronisation or both???
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Re: synchronisation [ In reply to ]
On 4/22/12 8:56 PM, ujjwal maghaiya wrote:

> what is the type of synchronisation in CISCO devices,
> Time synchronisationo or Frequency synchronisation or both???

Depends on the context.

NTP is time synchronization. (Clock/calendar time)

T1 clocking is frequency synchronization.

BGP/IGP synchronization is an entirely different animal.

And from a practical standpoint, time synchronization and frequency
synchronization are essentially the same thing. Frequency is nothing
more than a measure of events per unit time.

--
Jay Hennigan - CCIE #7880 - Network Engineering - jay@impulse.net
Impulse Internet Service - http://www.impulse.net/
Your local telephone and internet company - 805 884-6323 - WB6RDV
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Re: synchronisation [ In reply to ]
hi,
thanks for the reply
but i dont think frequecy and time synchronisation are not the same thing. Specially in the field of telecommunication, radio part, frequecy synchronisation has great significance than time.










> Date: Sun, 22 Apr 2012 21:10:52 -0700
> From: jay@west.net
> To: cisco-nsp@puck.nether.net
> Subject: Re: [c-nsp] synchronisation
>
> On 4/22/12 8:56 PM, ujjwal maghaiya wrote:
>
> > what is the type of synchronisation in CISCO devices,
> > Time synchronisationo or Frequency synchronisation or both???
>
> Depends on the context.
>
> NTP is time synchronization. (Clock/calendar time)
>
> T1 clocking is frequency synchronization.
>
> BGP/IGP synchronization is an entirely different animal.
>
> And from a practical standpoint, time synchronization and frequency
> synchronization are essentially the same thing. Frequency is nothing
> more than a measure of events per unit time.
>
> --
> Jay Hennigan - CCIE #7880 - Network Engineering - jay@impulse.net
> Impulse Internet Service - http://www.impulse.net/
> Your local telephone and internet company - 805 884-6323 - WB6RDV
> _______________________________________________
> cisco-nsp mailing list cisco-nsp@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/

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Re: synchronisation [ In reply to ]
Are you possibly referring to SyncE?

http://www.cisco.com/en/US/prod/collateral/routers/ps9853/white_paper_c11-500360_ns523_Networking_Solutions_White_Paper.html

-----Original Message-----
From: ujjwal maghaiya <ujjwal_12@hotmail.com>
Sender: cisco-nsp-bounces@puck.nether.netDate: Mon, 23 Apr 2012 10:26:53
To: <jay@west.net>; <cisco-nsp@puck.nether.net>
Subject: Re: [c-nsp] synchronisation


hi,
thanks for the reply
but i dont think frequecy and time synchronisation are not the same thing. Specially in the field of telecommunication, radio part, frequecy synchronisation has great significance than time.










> Date: Sun, 22 Apr 2012 21:10:52 -0700
> From: jay@west.net
> To: cisco-nsp@puck.nether.net
> Subject: Re: [c-nsp] synchronisation
>
> On 4/22/12 8:56 PM, ujjwal maghaiya wrote:
>
> > what is the type of synchronisation in CISCO devices,
> > Time synchronisationo or Frequency synchronisation or both???
>
> Depends on the context.
>
> NTP is time synchronization. (Clock/calendar time)
>
> T1 clocking is frequency synchronization.
>
> BGP/IGP synchronization is an entirely different animal.
>
> And from a practical standpoint, time synchronization and frequency
> synchronization are essentially the same thing. Frequency is nothing
> more than a measure of events per unit time.
>
> --
> Jay Hennigan - CCIE #7880 - Network Engineering - jay@impulse.net
> Impulse Internet Service - http://www.impulse.net/
> Your local telephone and internet company - 805 884-6323 - WB6RDV
> _______________________________________________
> cisco-nsp mailing list cisco-nsp@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/

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