DS3 or T3 and HSSI Interface

[Kuldeep singh]

Hi Experts,

I am looking for exact solution of my given problems,

1) What is main difference between DS3 and T3,

   as both have 45 Mbps ? where we can implement

   DS3 and T3, give me practical examples.

2) I have seen many posts where DS3 link has configured on

    different different Ports like as on :

    ---- Interface Fastethernet0/0  (one of our client are using)

    ---- Interface Serial0/0/.1

    ---- Interface hssi

is there no any fix standard of DS3 termination over router ?

3) HSSI is serial or ethernet ?

4) What will be the maximum speed supportable for

    Serial port ?

KS

[paolo bevilacqua · Accepted solution]

1. Different names, same thing.

2  Normally, a native DS3/T3 interface. If ethernet or serial, they are using a device like a router or DSU, usually supplied by ISP.

3 Serial

4. 45 Mbps.

[Kuldeep singh]

Thanks for ur reply Mr. Paolo

[paolo bevilacqua]

You're welcome, thank you for the nice rating, and good luck!.

[Joseph W. Doherty · Accepted solution]

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Posting

T3 and DS3 are almost the same, T3 is when link is used for telecom and DS3 when link is used for data communications.

DS3 would normally use a high speed serial interface.  An Ethernet hand-off would imply some media conversion.

HSSI is serial.

I believe non-HSSI serial interfaces are good up to about 8 (?) Mbps and HSSI interfaces up to about 50 (?) Mbps.