I have a customer who has a Siemens ISDX PABX with DPNSS modules available. We are proposing connecting a Call Manager system to the PABX using a cisco router with an E1 module running QSIG and a DPNSS-QSIG converter as the gateway
The customer is concerned about feature/functionality loss re Siemens vs Cisco when the two are inter connected.
The PABX version is 6.1.
Does anyone have any experience with the inter-operability of the systems and any info on the feature support of an integrated system - in particular any major Siemens features that are not supported?