ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 18-1
Beta Draft Confidential
18
Configuring SPVCs
A permanent virtual circuit (PVC) is established administratively (that is, by network 
management) rather than on demand (that is, using signaling across the UNI). A soft 
PVC (SPVC) is established by the network using signaling. Once the SPVC 
configuration is in place, the switch at one end of the SPVC initiates the signaling. 
This release supports up to 4096K SPVCs per card.
The NMS provisions one end of the SPVC with the address identifying the egress 
interface from the network. The calling end has the responsibility for establishing, 
releasing, and re-establishing the call.
Supported Modules
SPVCs are supported on the following ATM modules:
Table 18-1. SPVC ATM Module Support
CBX 3500 CBX 500 GX 550 B-STDX 9000
4-Port ATM UNI 
OC-3c/STM-1
4-Port ATM UNI 
OC-3c/STM-1
BIO1 1-Port ATM CS 
DS3
16-Port OC-3/STM-1 3-Port Channelized 
DS3/1 IMA
BIO2 1-Port ATM CS E3
1-Port Channelized 
STM-1/E1 IMA 
Enhanced
1-Port Channelized 
STM-1/E1 IMA
BIO-C 1-Port ATM IWU
3-Port Channelized 
DS3/1 IMA Enhanced
60-Port 
Channelized T1/E1 
Circuit Emulation
4-Port OC-12c/STM-4
1-Port OC-48c/STM-16
24-Port DS3 ATM