If it helps, I downloaded the following MIBS in order to snmpwalk in a readable manner the 7800 (no wireless)
wget http://www.simpleweb.org/ietf/mibs/modu ... Pv2-TC-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... v2-SMI-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... MEWORK-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... DDRESS-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... ED-ACM-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... 2-CONF-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... SNMPv2-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... txt/IF-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... ifType-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... ist-TC-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... FC1155-SMI
wget http://www.simpleweb.org/ietf/mibs/modu ... t/RFC-1212
wget http://www.simpleweb.org/ietf/mibs/modu ... NE-EXT-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... DSL-TC-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... L-LINE-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... FC1213-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... xt/ATM-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... ATM-TC-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... SED-SM-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... MP-MPD-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... xt/TCP-MIB
wget http://www.simpleweb.org/ietf/mibs/modu ... xt/UDP-MIB
Some you should clearly have already others probably not.