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Symbol does not offer a PBX gateway solution Voice quality poor compared with competitive offerings |
We liked the system's easily accessible address book, something that none of the other phones provided. But on the whole, we found the phones from Cisco and SpectraLink somewhat more like cell phones and thus more intuitive for the typical user.
Symbol also provides SVP support, but this time it's Symbol Voice Protocol. It uses RTP (Realtime Transport Protocol) transport of audio streams. At least someone uses open standards! Any AP capable of prioritizing RTP traffic can provide higher priority for NetVision phones. Support for this mechanism is provided via checkbox on Cisco's 350 and 1200 series APs, and is also supported on Symbol's APs.
We wanted to test a Symbol phone with SCCP support, but the code that Symbol currently offers won't work with Cisco Call Manager 3.3(3), the version we used during testing. Symbol is re-evaluating its relationship with Cisco now that Cisco has its own competitive offering.
In our testing, the NetVision phone did not perform as well as the SpectraLink and Cisco offerings. It had the worst results for both voice quality and range. Range limitations might not be a huge issue for organizations with dense AP deployments, but that's not usually the case in enterprises that are the primary target market for these devices. When we walked to the fringes of the product's coverage areas, the system dropped calls, requiring us to constantly redial the other phone to continue. We did not experience any problems with Layer 2 roaming.
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