[root@picodedante zaptel-1.4.0]# ztcfg -vv

Zaptel Version: 1.4.0
Echo Canceller: MG2
Configuration
======================

SPAN 1: ESF/B8ZS Build-out: 133-266 feet (DSX-1)
SPAN 2: ESF/B8ZS Build-out: 133-266 feet (DSX-1)

Channel map:

Channel 01: FXS Kewlstart (Default) (Slaves: 01)
Channel 02: FXS Kewlstart (Default) (Slaves: 02)
Channel 03: FXS Kewlstart (Default) (Slaves: 03)
Channel 04: FXS Kewlstart (Default) (Slaves: 04)
Channel 25: Clear channel (Default) (Slaves: 25)
Channel 26: Clear channel (Default) (Slaves: 26)
Channel 27: Clear channel (Default) (Slaves: 27)
Channel 28: Clear channel (Default) (Slaves: 28)
Channel 29: Clear channel (Default) (Slaves: 29)
Channel 30: Clear channel (Default) (Slaves: 30)
Channel 31: Clear channel (Default) (Slaves: 31)
Channel 32: Clear channel (Default) (Slaves: 32)
Channel 33: Clear channel (Default) (Slaves: 33)
Channel 34: Clear channel (Default) (Slaves: 34)
Channel 35: Clear channel (Default) (Slaves: 35)
Channel 36: Clear channel (Default) (Slaves: 36)
Channel 37: Clear channel (Default) (Slaves: 37)
Channel 38: Clear channel (Default) (Slaves: 38)
Channel 39: Clear channel (Default) (Slaves: 39)
Channel 40: Clear channel (Default) (Slaves: 40)
Channel 41: Clear channel (Default) (Slaves: 41)
Channel 42: Clear channel (Default) (Slaves: 42)
Channel 43: Clear channel (Default) (Slaves: 43)
Channel 44: Clear channel (Default) (Slaves: 44)
Channel 45: Clear channel (Default) (Slaves: 45)
Channel 46: Clear channel (Default) (Slaves: 46)
Channel 47: Clear channel (Default) (Slaves: 47)
Channel 48: D-channel (Default) (Slaves: 48)
Channel 49: Clear channel (Default) (Slaves: 49)
Channel 50: Clear channel (Default) (Slaves: 50)
Channel 51: Clear channel (Default) (Slaves: 51)
Channel 52: Clear channel (Default) (Slaves: 52)
Channel 53: Clear channel (Default) (Slaves: 53)
Channel 54: Clear channel (Default) (Slaves: 54)
Channel 55: Clear channel (Default) (Slaves: 55)
Channel 56: Clear channel (Default) (Slaves: 56)
Channel 57: Clear channel (Default) (Slaves: 57)
Channel 58: Clear channel (Default) (Slaves: 58)
Channel 59: Clear channel (Default) (Slaves: 59)
Channel 60: Clear channel (Default) (Slaves: 60)
Channel 61: Clear channel (Default) (Slaves: 61)
Channel 62: Clear channel (Default) (Slaves: 62)
Channel 63: Clear channel (Default) (Slaves: 63)
Channel 64: Clear channel (Default) (Slaves: 64)
Channel 65: Clear channel (Default) (Slaves: 65)
Channel 66: Clear channel (Default) (Slaves: 66)
Channel 67: Clear channel (Default) (Slaves: 67)
Channel 68: Clear channel (Default) (Slaves: 68)
Channel 69: Clear channel (Default) (Slaves: 69)
Channel 70: Clear channel (Default) (Slaves: 70)
Channel 71: Clear channel (Default) (Slaves: 71)
Channel 72: D-channel (Default) (Slaves: 72)

52 channels configured.

CAS signalling on span 3 conflicts with Clear channel on channel 64.