This is just the framing method for the OC3. In fact, there is no
difference between STMx and OC(3x) in an ATM environment. The only
difference would be APS/MSP. Otherwise, and ATM switch sees a frame STM1 as
identical to a frame OC3. Cisco introduced this as the default framing
recently - I am not sure why.
> -----Original Message-----
> From: TMS [mailto:firstname.lastname@example.org]
> Sent: Wednesday, February 06, 2002 1:11 PM
> To: email@example.com
> Subject: [nsp] "catalyst 8510 msr + 4-port atm/oc3 card" and the
> Question ...
> I have Catalyst 8510 MSR with 4 port ATM/OC3 card. If I
> do something like that:
> cat8540#conf t
> Enter configuration commands, one per line. End with CNTL/Z.
> cat8540(config)#int atm 0/0/0
> cat8540(config-if)#sonet stm-1
> atm interface will be look's like that:
> cat8540#sh controllers atm 0/0/0
> IF Name: ATM0/0/0 Chip Base Address: A8808000
> Port type: OC3 Port rate: 155000 Kbps Port medium: SM Fiber
> Port status:SECTION LOS Loopback:None Flags:8300
> TX Led: Traffic Pattern RX Led: Traffic Pattern
> TX clock source: network-derived
> Framing mode: stm-1
> And the question is: Is "sonet stm-1" command is enough to use
> this ATM port as STM-1 Sonet/SDH port ?
> btw. I looked in Cisco Pricing Spreadsheet and I didn't see Sonet/SDH
> cards for Cat8510, maybe I'm blind....
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