Airlink101 G3210 User Manual page 22

Raven and PinPoint GPRS User Guide Version 1.50
no PPP (or SLIP) peer (i.e. modem is not in PPP or SLIP mode), then "ppp-peer" will
resolve to 0.0.0.0. If, for example, you wanted to report IP address changes to the
host connected via the serial link, you could set AT*IPMANAGER2=ppp-peer to
cause updates to be sent to the serial host.
AirLink Communications, Inc. Page 14 April 28, 2005