Physical Wiring

• Cat5e required; Cat6 or above recommended.

• Inside wiring is subject to testing and qualification by RTC installers — insufficient or problematic wiring can delay some or all delivery dates.

Power Options

• PoE, 802.3af (Type 1), via injector or switch. PoE-capable switches should have an aggregate power budget suitable for the number of phones being connected (e.g., a 60W switch may only power 4–6 phones, even with 8 ports available).

• 12V wall adapters can be used in place of PoE.

• Desk phones with multiple sidecars may need supplemental power bricks.

Network Switches

• Ports should support 10/100 Mbps or 10/100/1000 Mbps, with autonegotiation.

• 802.1X is not supported.

Broadcast Domain

• A dedicated network/VLAN for phones is not required, but is encouraged.

IP Addresses

• Phones can use public or private IPv4 Addresses. This requires at least one IP that can reach the internet; a dedicated, static, or public IP is not required (CGNAT is acceptable), though at least one public IP is encouraged.

• IPv6 is not supported at this time for connecting to RTC Voice Cloud.

DHCP

• Phones use DHCP and should be provided a default route and DNS servers.

• NTP servers should not be provided via DHCP.

• Static reservations are fine.

Router Features

• NAT is required if private address space is used.

• SIP-ALG and similar ALG features should be disabled anywhere they could interfere with the phones.