Cisco
Register a Cisco 68xx or 88xx multiplatform (MPP) phone on your desk phone line.
You need the line's SIP credentials from Settings → Call routing — see Desk phones for how to reveal them.
These steps apply to multiplatform (MPP) firmware — the open-SIP variant. A phone running Cisco's Enterprise firmware must be converted to MPP before it can register with a third-party SIP service.
Connect the phone to your network and power. Press Applications → Status → Network status to read its IP address.
In a browser on the same network, open https://<phone-ip> and switch to
Admin Login → advanced.
On the Voice → Ext 1 tab, fill in:
- Line Enable: Yes
- Proxy (under Proxy and Registration):
sip.telnyx.com - Register Expires:
180 - Display Name: your practice name
- User ID and Auth ID: the line's username
- Password: the line's password
- SIP Transport (under SIP Settings): TLS, port
5061
Under Voice → Ext 1 → Audio Configuration, keep G711u, G711a and G722 as preferred codecs.
Click Submit All Changes. The phone reboots and the line label stops flashing once registered.
Call the number from a mobile — the handset rings. If the line is two-way, dial out to confirm outbound.
Cisco's MPP documentation lives at cisco.com, and the carrier's guide is Cisco: 68xx/88xx setup.