Hi all,
I'm in the process of moving one of our remote offices from one carrier to
another. At the moment we have an L3VPN terminating GigE at the remote
end on a 7301 and DS3 on a G1 with PA-2T3 at the head office. Link does
10Mbit about half split between voice and data.
The new carrier has provisioned a 45Mbit clear channel service with a DS3
at the remote site, and a channelised STM1 at the head office. I can't
seem to find a combination of router/card/mux to make this work.
- Cisco 7200 with PA-MC-STM1 can't channelise larger than E1.
- Cisco 7600 with SPA-1XCHSTM1/OC3 can do it according to the spec sheet
for the SPA, but is incredibly over-speced and pricey.
- Adtran Opti-3 is SONET/OC3 only (but I can't find confirmation of this).
- Juniper M7i with STM1 IQ PIC can't channelise larger than E1.
- Juniper M7i with OC3 IQ PIC can channelise DS3, but doesn't do SDH
framing for STM1.
- The carrier suggested re-engineering the service to deliver 21 E1s and
run MLPPP over them. The data sheet for the PA-MC-T3-EC indicates MLPPP is
only possible in hardware up to 12 T1s. I doubt MLPPP in software would
perform at all, let alone perform well.
I've never worked with channelised services more complicated than DS0s in
an E1, so I've got a few questions:
- Has anyone ever done this? What config/hardware did you use?
- Are there any muxes/converters/router interfaces that can do this at the
~20Mbit end of the market?
- Does the Adtran support intermixing of SONET and SDH (DS3 over STM1)?
Many thanks,
- I.
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